Fix Sonar issue s2293 The diamond operator ('<>') should be used (#14005)

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/SingleRouterChain.java

@@ -212,7 +212,7 @@ public class SingleRouterChain<T> {
     public RouterSnapshotNode<T> buildRouterSnapshot(
             URL url, BitList<Invoker<T>> availableInvokers, Invocation invocation) {
         BitList<Invoker<T>> resultInvokers = availableInvokers.clone();
-        RouterSnapshotNode<T> parentNode = new RouterSnapshotNode<T>("Parent", resultInvokers.clone());
+        RouterSnapshotNode<T> parentNode = new RouterSnapshotNode<>("Parent", resultInvokers.clone());
         parentNode.setNodeOutputInvokers(resultInvokers.clone());
 
         // 1. route state router
@@ -227,7 +227,7 @@ public class SingleRouterChain<T> {
             return parentNode;
         }
 
-        RouterSnapshotNode<T> commonRouterNode = new RouterSnapshotNode<T>("CommonRouter", resultInvokers.clone());
+        RouterSnapshotNode<T> commonRouterNode = new RouterSnapshotNode<>("CommonRouter", resultInvokers.clone());
         parentNode.appendNode(commonRouterNode);
         List<Invoker<T>> commonRouterResult = resultInvokers;
 
@@ -237,7 +237,7 @@ public class SingleRouterChain<T> {
             List<Invoker<T>> inputInvokers = new ArrayList<>(commonRouterResult);
 
             RouterSnapshotNode<T> currentNode =
-                    new RouterSnapshotNode<T>(router.getClass().getSimpleName(), inputInvokers);
+                    new RouterSnapshotNode<>(router.getClass().getSimpleName(), inputInvokers);
 
             // append to router node chain
             commonRouterNode.appendNode(currentNode);

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/configurator/AbstractConfigurator.java

@@ -223,7 +223,7 @@ public abstract class AbstractConfigurator implements Configurator {
     }
 
     private Set<String> genConditionKeys() {
-        Set<String> conditionKeys = new HashSet<String>();
+        Set<String> conditionKeys = new HashSet<>();
         conditionKeys.add(CATEGORY_KEY);
         conditionKeys.add(Constants.CHECK_KEY);
         conditionKeys.add(DYNAMIC_KEY);

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/loadbalance/ConsistentHashLoadBalance.java

@@ -46,8 +46,7 @@ public class ConsistentHashLoadBalance extends AbstractLoadBalance {
      */
     public static final String HASH_ARGUMENTS = "hash.arguments";
 
-    private final ConcurrentMap<String, ConsistentHashSelector<?>> selectors =
+    private final ConcurrentMap<String, ConsistentHashSelector<?>> selectors = new ConcurrentHashMap<>();
-            new ConcurrentHashMap<String, ConsistentHashSelector<?>>();
 
     @SuppressWarnings("unchecked")
     @Override
@@ -75,7 +74,7 @@ public class ConsistentHashLoadBalance extends AbstractLoadBalance {
         private final int[] argumentIndex;
 
         ConsistentHashSelector(List<Invoker<T>> invokers, String methodName, int identityHashCode) {
-            this.virtualInvokers = new TreeMap<Long, Invoker<T>>();
+            this.virtualInvokers = new TreeMap<>();
             this.identityHashCode = identityHashCode;
             URL url = invokers.get(0).getUrl();
             this.replicaNumber = url.getMethodParameter(methodName, HASH_NODES, 160);

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/merger/MapMerger.java

@@ -32,7 +32,7 @@ public class MapMerger implements Merger<Map<?, ?>> {
         if (ArrayUtils.isEmpty(items)) {
             return Collections.emptyMap();
         }
-        Map<Object, Object> result = new HashMap<Object, Object>();
+        Map<Object, Object> result = new HashMap<>();
         Stream.of(items).filter(Objects::nonNull).forEach(result::putAll);
         return result;
     }

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/merger/MergerFactory.java

@@ -36,7 +36,7 @@ public class MergerFactory implements ScopeModelAware {
 
     private static final ErrorTypeAwareLogger logger = LoggerFactory.getErrorTypeAwareLogger(MergerFactory.class);
 
-    private ConcurrentMap<Class<?>, Merger<?>> MERGER_CACHE = new ConcurrentHashMap<Class<?>, Merger<?>>();
+    private ConcurrentMap<Class<?>, Merger<?>> MERGER_CACHE = new ConcurrentHashMap<>();
     private ScopeModel scopeModel;
 
     @Override

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/merger/SetMerger.java

@@ -32,7 +32,7 @@ public class SetMerger implements Merger<Set<?>> {
         if (ArrayUtils.isEmpty(items)) {
             return Collections.emptySet();
         }
-        Set<Object> result = new HashSet<Object>();
+        Set<Object> result = new HashSet<>();
         Stream.of(items).filter(Objects::nonNull).forEach(result::addAll);
         return result;
     }

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/condition/ConditionStateRouterFactory.java

@@ -30,6 +30,6 @@ public class ConditionStateRouterFactory extends CacheableStateRouterFactory {
 
     @Override
     protected <T> StateRouter<T> createRouter(Class<T> interfaceClass, URL url) {
-        return new ConditionStateRouter<T>(url);
+        return new ConditionStateRouter<>(url);
     }
 }

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/condition/config/ServiceStateRouterFactory.java

@@ -32,6 +32,6 @@ public class ServiceStateRouterFactory extends CacheableStateRouterFactory {
 
     @Override
     protected <T> StateRouter<T> createRouter(Class<T> interfaceClass, URL url) {
-        return new ServiceStateRouter<T>(url);
+        return new ServiceStateRouter<>(url);
     }
 }

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/mesh/route/MeshRuleCache.java

@@ -136,7 +136,7 @@ public class MeshRuleCache<T> {
                     Collections.unmodifiableMap(totalSubsetMap),
                     unmatchedInvokers);
         } else {
-            return new MeshRuleCache<T>(
+            return new MeshRuleCache<>(
                     Collections.emptyList(), Collections.emptyMap(), Collections.emptyMap(), invokers);
         }
     }

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/mock/MockStateRouterFactory.java

@@ -30,6 +30,6 @@ public class MockStateRouterFactory implements StateRouterFactory {
 
     @Override
     public <T> StateRouter<T> getRouter(Class<T> interfaceClass, URL url) {
-        return new MockInvokersSelector<T>(url);
+        return new MockInvokersSelector<>(url);
     }
 }

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/tag/TagStateRouterFactory.java

@@ -31,6 +31,6 @@ public class TagStateRouterFactory extends CacheableStateRouterFactory {
 
     @Override
     protected <T> StateRouter<T> createRouter(Class<T> interfaceClass, URL url) {
-        return new TagStateRouter<T>(url);
+        return new TagStateRouter<>(url);
     }
 }

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/support/FailoverClusterInvoker.java

@@ -63,8 +63,8 @@ public class FailoverClusterInvoker<T> extends AbstractClusterInvoker<T> {
         int len = calculateInvokeTimes(methodName);
         // retry loop.
         RpcException le = null; // last exception.
-        List<Invoker<T>> invoked = new ArrayList<Invoker<T>>(copyInvokers.size()); // invoked invokers.
+        List<Invoker<T>> invoked = new ArrayList<>(copyInvokers.size()); // invoked invokers.
-        Set<String> providers = new HashSet<String>(len);
+        Set<String> providers = new HashSet<>(len);
         for (int i = 0; i < len; i++) {
             // Reselect before retry to avoid a change of candidate `invokers`.
             // NOTE: if `invokers` changed, then `invoked` also lose accuracy.

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/support/MergeableCluster.java

@@ -26,6 +26,6 @@ public class MergeableCluster extends AbstractCluster {
 
     @Override
     public <T> AbstractClusterInvoker<T> doJoin(Directory<T> directory) throws RpcException {
-        return new MergeableClusterInvoker<T>(directory);
+        return new MergeableClusterInvoker<>(directory);
     }
 }

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/support/registry/ZoneAwareCluster.java

@@ -27,6 +27,6 @@ public class ZoneAwareCluster extends AbstractCluster {
 
     @Override
     protected <T> AbstractClusterInvoker<T> doJoin(Directory<T> directory) throws RpcException {
-        return new ZoneAwareClusterInvoker<T>(directory);
+        return new ZoneAwareClusterInvoker<>(directory);
     }
 }

dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/support/wrapper/MockClusterWrapper.java

@@ -35,7 +35,7 @@ public class MockClusterWrapper implements Cluster {
 
     @Override
     public <T> Invoker<T> join(Directory<T> directory, boolean buildFilterChain) throws RpcException {
-        return new MockClusterInvoker<T>(directory, this.cluster.join(directory, buildFilterChain));
+        return new MockClusterInvoker<>(directory, this.cluster.join(directory, buildFilterChain));
     }
 
     public Cluster getCluster() {

dubbo-common/src/main/java/org/apache/dubbo/common/Version.java

@@ -60,7 +60,7 @@ public final class Version {
     public static final int LOWEST_VERSION_FOR_RESPONSE_ATTACHMENT = 2000200; // 2.0.2
 
     public static final int HIGHEST_PROTOCOL_VERSION = 2009900; // 2.0.99
-    private static final Map<String, Integer> VERSION2INT = new HashMap<String, Integer>();
+    private static final Map<String, Integer> VERSION2INT = new HashMap<>();
 
     static {
         // get dubbo version and last commit id

dubbo-common/src/main/java/org/apache/dubbo/common/beanutil/JavaBeanSerializeUtil.java

@@ -35,7 +35,7 @@ import java.util.Map;
 public final class JavaBeanSerializeUtil {
 
     private static final Logger logger = LoggerFactory.getLogger(JavaBeanSerializeUtil.class);
-    private static final Map<String, Class<?>> TYPES = new HashMap<String, Class<?>>();
+    private static final Map<String, Class<?>> TYPES = new HashMap<>();
     private static final String ARRAY_PREFIX = "[";
     private static final String REFERENCE_TYPE_PREFIX = "L";
     private static final String REFERENCE_TYPE_SUFFIX = ";";
@@ -72,7 +72,7 @@ public final class JavaBeanSerializeUtil {
         if (obj instanceof JavaBeanDescriptor) {
             return (JavaBeanDescriptor) obj;
         }
-        IdentityHashMap<Object, JavaBeanDescriptor> cache = new IdentityHashMap<Object, JavaBeanDescriptor>();
+        IdentityHashMap<Object, JavaBeanDescriptor> cache = new IdentityHashMap<>();
         return createDescriptorIfAbsent(obj, accessor, cache);
     }
 
@@ -209,7 +209,7 @@ public final class JavaBeanSerializeUtil {
         if (beanDescriptor == null) {
             return null;
         }
-        IdentityHashMap<JavaBeanDescriptor, Object> cache = new IdentityHashMap<JavaBeanDescriptor, Object>();
+        IdentityHashMap<JavaBeanDescriptor, Object> cache = new IdentityHashMap<>();
         Object result = instantiateForDeserialize(beanDescriptor, loader, cache);
         deserializeInternal(result, beanDescriptor, loader, cache);
         return result;

dubbo-common/src/main/java/org/apache/dubbo/common/bytecode/Mixin.java

@@ -120,7 +120,7 @@ public abstract class Mixin {
 
             Class<?> neighbor = null;
             // impl methods.
-            Set<String> worked = new HashSet<String>();
+            Set<String> worked = new HashSet<>();
             for (int i = 0; i < ics.length; i++) {
                 if (!Modifier.isPublic(ics[i].getModifiers())) {
                     String npkg = ics[i].getPackage().getName();

dubbo-common/src/main/java/org/apache/dubbo/common/bytecode/Wrapper.java

@@ -42,8 +42,8 @@ import javassist.CtMethod;
  * Wrapper.
  */
 public abstract class Wrapper {
-    private static final ConcurrentMap<Class<?>, Wrapper> WRAPPER_MAP =
+    // class wrapper map
-            new ConcurrentHashMap<Class<?>, Wrapper>(); // class wrapper map
+    private static final ConcurrentMap<Class<?>, Wrapper> WRAPPER_MAP = new ConcurrentHashMap<>();
     private static final String[] EMPTY_STRING_ARRAY = new String[0];
     private static final String[] OBJECT_METHODS = new String[] {"getClass", "hashCode", "toString", "equals"};
     private static final Wrapper OBJECT_WRAPPER = new Wrapper() {

dubbo-common/src/main/java/org/apache/dubbo/common/compiler/support/ClassUtils.java

@@ -392,7 +392,7 @@ public class ClassUtils {
     }
 
     public static <K, V> Map<K, V> toMap(Map.Entry<K, V>[] entries) {
-        Map<K, V> map = new HashMap<K, V>();
+        Map<K, V> map = new HashMap<>();
         if (entries != null && entries.length > 0) {
             for (Map.Entry<K, V> entry : entries) {
                 map.put(entry.getKey(), entry.getValue());

dubbo-common/src/main/java/org/apache/dubbo/common/threadlocal/InternalThreadLocalMap.java

@@ -28,7 +28,7 @@ public final class InternalThreadLocalMap {
 
     private Object[] indexedVariables;
 
-    private static ThreadLocal<InternalThreadLocalMap> slowThreadLocalMap = new ThreadLocal<InternalThreadLocalMap>();
+    private static ThreadLocal<InternalThreadLocalMap> slowThreadLocalMap = new ThreadLocal<>();
 
     private static final AtomicInteger NEXT_INDEX = new AtomicInteger();
 

dubbo-common/src/main/java/org/apache/dubbo/common/timer/HashedWheelTimer.java

@@ -427,7 +427,7 @@ public class HashedWheelTimer implements Timer {
     }
 
     private final class Worker implements Runnable {
-        private final Set<Timeout> unprocessedTimeouts = new HashSet<Timeout>();
+        private final Set<Timeout> unprocessedTimeouts = new HashSet<>();
 
         private long tick;
 

dubbo-common/src/main/java/org/apache/dubbo/common/utils/CIDRUtils.java

@@ -98,7 +98,7 @@ public class CIDRUtils {
 
     private byte[] toBytes(byte[] array, int targetSize) {
         int counter = 0;
-        List<Byte> newArr = new ArrayList<Byte>();
+        List<Byte> newArr = new ArrayList<>();
         while (counter < targetSize && (array.length - 1 - counter >= 0)) {
             newArr.add(0, array[array.length - 1 - counter]);
             counter++;

dubbo-common/src/main/java/org/apache/dubbo/common/utils/ConfigUtils.java

@@ -87,7 +87,7 @@ public class ConfigUtils {
      */
     public static List<String> mergeValues(
             ExtensionDirector extensionDirector, Class<?> type, String cfg, List<String> def) {
-        List<String> defaults = new ArrayList<String>();
+        List<String> defaults = new ArrayList<>();
         if (def != null) {
             for (String name : def) {
                 if (extensionDirector.getExtensionLoader(type).hasExtension(name)) {
@@ -96,7 +96,7 @@ public class ConfigUtils {
             }
         }
 
-        List<String> names = new ArrayList<String>();
+        List<String> names = new ArrayList<>();
 
         // add initial values
         String[] configs = (cfg == null || cfg.trim().length() == 0) ? new String[0] : COMMA_SPLIT_PATTERN.split(cfg);

dubbo-common/src/main/java/org/apache/dubbo/common/utils/IOUtils.java

@@ -179,7 +179,7 @@ public class IOUtils {
      * @throws IOException If an I/O error occurs
      */
     public static String[] readLines(InputStream is) throws IOException {
-        List<String> lines = new ArrayList<String>();
+        List<String> lines = new ArrayList<>();
         try (BufferedReader reader = new BufferedReader(new InputStreamReader(is))) {
             String line;
             while ((line = reader.readLine()) != null) {

dubbo-common/src/main/java/org/apache/dubbo/common/utils/Stack.java

@@ -26,7 +26,7 @@ import java.util.List;
 public class Stack<E> {
     private int mSize = 0;
 
-    private final List<E> mElements = new ArrayList<E>();
+    private final List<E> mElements = new ArrayList<>();
 
     public Stack() {}
 

dubbo-common/src/main/java/org/apache/dubbo/common/utils/StringUtils.java

@@ -861,7 +861,7 @@ public final class StringUtils {
      */
     private static Map<String, String> parseKeyValuePair(String str, String itemSeparator) {
         String[] tmp = str.split(itemSeparator);
-        Map<String, String> map = new HashMap<String, String>(tmp.length);
+        Map<String, String> map = new HashMap<>(tmp.length);
         for (int i = 0; i < tmp.length; i++) {
             Matcher matcher = KVP_PATTERN.matcher(tmp[i]);
             if (!matcher.matches()) {
@@ -885,7 +885,7 @@ public final class StringUtils {
      */
     public static Map<String, String> parseQueryString(String qs) {
         if (isEmpty(qs)) {
-            return new HashMap<String, String>();
+            return new HashMap<>();
         }
         return parseKeyValuePair(qs, "\\&");
     }

dubbo-common/src/main/java/org/apache/dubbo/common/utils/UrlUtils.java

@@ -181,7 +181,7 @@ public class UrlUtils {
             throw new IllegalArgumentException(
                     "Addresses is not allowed to be empty, please re-enter."); // here won't be empty
         }
-        List<URL> registries = new ArrayList<URL>();
+        List<URL> registries = new ArrayList<>();
         for (String addr : addresses) {
             registries.add(parseURL(addr, defaults));
         }

dubbo-common/src/main/java/org/apache/dubbo/config/AbstractInterfaceConfig.java

@@ -204,7 +204,7 @@ public abstract class AbstractInterfaceConfig extends AbstractMethodConfig {
     /**
      * The url of the reference service
      */
-    protected final transient List<URL> urls = new ArrayList<URL>();
+    protected final transient List<URL> urls = new ArrayList<>();
 
     @Transient
     public List<URL> getExportedUrls() {

dubbo-common/src/main/java/org/apache/dubbo/config/ApplicationConfig.java

@@ -361,7 +361,7 @@ public class ApplicationConfig extends AbstractConfig {
     }
 
     public void setRegistry(RegistryConfig registry) {
-        List<RegistryConfig> registries = new ArrayList<RegistryConfig>(1);
+        List<RegistryConfig> registries = new ArrayList<>(1);
         registries.add(registry);
         this.registries = registries;
     }

dubbo-common/src/main/java/org/apache/dubbo/config/ModuleConfig.java

@@ -186,7 +186,7 @@ public class ModuleConfig extends AbstractConfig {
     }
 
     public void setRegistry(RegistryConfig registry) {
-        List<RegistryConfig> registries = new ArrayList<RegistryConfig>(1);
+        List<RegistryConfig> registries = new ArrayList<>(1);
         registries.add(registry);
         this.registries = registries;
     }

dubbo-common/src/main/java/org/apache/dubbo/metadata/definition/util/ClassUtils.java

@@ -96,7 +96,7 @@ public final class ClassUtils {
      * @return methods list
      */
     public static List<Method> getPublicNonStaticMethods(final Class<?> clazz) {
-        List<Method> result = new ArrayList<Method>();
+        List<Method> result = new ArrayList<>();
 
         Method[] methods = clazz.getMethods();
         for (Method method : methods) {

dubbo-common/src/main/java/org/apache/dubbo/rpc/model/ProviderModel.java

@@ -135,7 +135,7 @@ public class ProviderModel extends ServiceModel {
     }
 
     public List<ProviderMethodModel> getAllMethodModels() {
-        List<ProviderMethodModel> result = new ArrayList<ProviderMethodModel>();
+        List<ProviderMethodModel> result = new ArrayList<>();
         for (List<ProviderMethodModel> models : methods.values()) {
             result.addAll(models);
         }

dubbo-compatible/src/main/java/com/alibaba/dubbo/cache/support/AbstractCacheFactory.java

@@ -30,7 +30,7 @@ import static org.apache.dubbo.common.constants.CommonConstants.METHOD_KEY;
 @Deprecated
 public abstract class AbstractCacheFactory implements CacheFactory {
 
-    private final ConcurrentMap<String, Cache> caches = new ConcurrentHashMap<String, Cache>();
+    private final ConcurrentMap<String, Cache> caches = new ConcurrentHashMap<>();
 
     @Override
     public Cache getCache(URL url, Invocation invocation) {

dubbo-compatible/src/main/java/com/alibaba/dubbo/config/ServiceConfig.java

@@ -86,7 +86,7 @@ public class ServiceConfig<T> extends org.apache.dubbo.config.ServiceConfig<T> {
         if (providers == null || providers.isEmpty()) {
             return null;
         }
-        List<ProtocolConfig> protocols = new ArrayList<ProtocolConfig>(providers.size());
+        List<ProtocolConfig> protocols = new ArrayList<>(providers.size());
         for (ProviderConfig provider : providers) {
             protocols.add(convertProviderToProtocol(provider));
         }

dubbo-compatible/src/main/java/com/alibaba/dubbo/container/page/Page.java

@@ -57,8 +57,8 @@ public class Page {
     }
 
     private static List<List<String>> stringToList(String str) {
-        List<List<String>> rows = new ArrayList<List<String>>();
+        List<List<String>> rows = new ArrayList<>();
-        List<String> row = new ArrayList<String>();
+        List<String> row = new ArrayList<>();
         row.add(str);
         rows.add(row);
         return rows;

dubbo-compatible/src/main/java/com/alibaba/dubbo/container/page/PageServlet.java

@@ -49,8 +49,8 @@ public class PageServlet extends HttpServlet {
     private static final long serialVersionUID = -8370312705453328501L;
     private static PageServlet INSTANCE;
     protected final Random random = new Random();
-    protected final Map<String, PageHandler> pages = new ConcurrentHashMap<String, PageHandler>();
+    protected final Map<String, PageHandler> pages = new ConcurrentHashMap<>();
-    protected final List<PageHandler> menus = new ArrayList<PageHandler>();
+    protected final List<PageHandler> menus = new ArrayList<>();
 
     public static PageServlet getInstance() {
         return INSTANCE;

dubbo-compatible/src/main/java/com/alibaba/dubbo/container/page/ResourceFilter.java

@@ -46,7 +46,7 @@ public class ResourceFilter implements Filter {
 
     private final long start = System.currentTimeMillis();
 
-    private final List<String> resources = new ArrayList<String>();
+    private final List<String> resources = new ArrayList<>();
 
     public void init(FilterConfig filterConfig) throws ServletException {
         String config = filterConfig.getInitParameter("resources");

dubbo-compatible/src/main/java/com/alibaba/dubbo/container/page/pages/HomePageHandler.java

@@ -35,11 +35,11 @@ public class HomePageHandler implements PageHandler {
 
     @Override
     public Page handle(URL url) {
-        List<List<String>> rows = new ArrayList<List<String>>();
+        List<List<String>> rows = new ArrayList<>();
         for (PageHandler handler : PageServlet.getInstance().getMenus()) {
             String uri = ExtensionLoader.getExtensionLoader(PageHandler.class).getExtensionName(handler);
             Menu menu = handler.getClass().getAnnotation(Menu.class);
-            List<String> row = new ArrayList<String>();
+            List<String> row = new ArrayList<>();
             row.add("<a href=\"" + uri + ".html\">" + menu.name() + "</a>");
             row.add(menu.desc());
             rows.add(row);

dubbo-compatible/src/main/java/com/alibaba/dubbo/container/page/pages/LogPageHandler.java

@@ -97,8 +97,8 @@ public class LogPageHandler implements PageHandler {
             }
         }
         Level level = LogManager.getRootLogger().getLevel();
-        List<List<String>> rows = new ArrayList<List<String>>();
+        List<List<String>> rows = new ArrayList<>();
-        List<String> row = new ArrayList<String>();
+        List<String> row = new ArrayList<>();
         row.add(content);
         rows.add(row);
         return new Page(

dubbo-compatible/src/main/java/com/alibaba/dubbo/container/page/pages/StatusPageHandler.java

@@ -40,14 +40,14 @@ public class StatusPageHandler implements PageHandler {
 
     @Override
     public Page handle(URL url) {
-        List<List<String>> rows = new ArrayList<List<String>>();
+        List<List<String>> rows = new ArrayList<>();
         Set<String> names =
                 ExtensionLoader.getExtensionLoader(StatusChecker.class).getSupportedExtensions();
-        Map<String, Status> statuses = new HashMap<String, Status>();
+        Map<String, Status> statuses = new HashMap<>();
         for (String name : names) {
             StatusChecker checker =
                     ExtensionLoader.getExtensionLoader(StatusChecker.class).getExtension(name);
-            List<String> row = new ArrayList<String>();
+            List<String> row = new ArrayList<>();
             row.add(name);
             Status status = checker.check();
             if (status != null && !Status.Level.UNKNOWN.equals(status.getLevel())) {
@@ -61,7 +61,7 @@ public class StatusPageHandler implements PageHandler {
         if ("status".equals(url.getPath())) {
             return new Page("", "", "", status.getLevel().toString());
         } else {
-            List<String> row = new ArrayList<String>();
+            List<String> row = new ArrayList<>();
             row.add("summary");
             row.add(getLevelHtml(status.getLevel()));
             row.add("<a href=\"/status\" target=\"_blank\">summary</a>");

dubbo-compatible/src/main/java/com/alibaba/dubbo/container/page/pages/SystemPageHandler.java

@@ -44,49 +44,49 @@ public class SystemPageHandler implements PageHandler {
 
     @Override
     public Page handle(URL url) {
-        List<List<String>> rows = new ArrayList<List<String>>();
+        List<List<String>> rows = new ArrayList<>();
         List<String> row;
 
-        row = new ArrayList<String>();
+        row = new ArrayList<>();
         row.add("Version");
         row.add(Version.getVersion(SystemPageHandler.class, "2.0.0"));
         rows.add(row);
 
-        row = new ArrayList<String>();
+        row = new ArrayList<>();
         row.add("Host");
         String address = NetUtils.getLocalHost();
         row.add(NetUtils.getHostName(address) + "/" + address);
         rows.add(row);
 
-        row = new ArrayList<String>();
+        row = new ArrayList<>();
         row.add("OS");
         row.add(System.getProperty("os.name") + " " + System.getProperty("os.version"));
         rows.add(row);
 
-        row = new ArrayList<String>();
+        row = new ArrayList<>();
         row.add("JVM");
         row.add(System.getProperty("java.runtime.name") + " " + System.getProperty("java.runtime.version") + ",<br/>"
                 + System.getProperty("java.vm.name") + " " + System.getProperty("java.vm.version") + " "
                 + System.getProperty("java.vm.info", ""));
         rows.add(row);
 
-        row = new ArrayList<String>();
+        row = new ArrayList<>();
         row.add("CPU");
         row.add(System.getProperty("os.arch", "") + ", "
                 + String.valueOf(Runtime.getRuntime().availableProcessors()) + " cores");
         rows.add(row);
 
-        row = new ArrayList<String>();
+        row = new ArrayList<>();
         row.add("Locale");
         row.add(Locale.getDefault().toString() + "/" + System.getProperty("file.encoding"));
         rows.add(row);
 
-        row = new ArrayList<String>();
+        row = new ArrayList<>();
         row.add("Uptime");
         row.add(formatUptime(ManagementFactory.getRuntimeMXBean().getUptime()));
         rows.add(row);
 
-        row = new ArrayList<String>();
+        row = new ArrayList<>();
         row.add("Time");
         row.add(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS Z").format(new Date()));
         rows.add(row);

dubbo-compatible/src/main/java/com/alibaba/dubbo/rpc/RpcContext.java

@@ -353,7 +353,7 @@ public class RpcContext {
                 final T o = callable.call();
                 // local invoke will return directly
                 if (o != null) {
-                    FutureTask<T> f = new FutureTask<T>(new Callable<T>() {
+                    FutureTask<T> f = new FutureTask<>(new Callable<T>() {
                         @Override
                         public T call() throws Exception {
                             return o;

dubbo-compatible/src/main/java/com/alibaba/dubbo/rpc/RpcInvocation.java

@@ -162,14 +162,14 @@ public class RpcInvocation implements Invocation, Serializable {
 
     public void setAttachment(String key, String value) {
         if (attachments == null) {
-            attachments = new HashMap<String, String>();
+            attachments = new HashMap<>();
         }
         attachments.put(key, value);
     }
 
     public void setAttachmentIfAbsent(String key, String value) {
         if (attachments == null) {
-            attachments = new HashMap<String, String>();
+            attachments = new HashMap<>();
         }
         if (!attachments.containsKey(key)) {
             attachments.put(key, value);
@@ -181,7 +181,7 @@ public class RpcInvocation implements Invocation, Serializable {
             return;
         }
         if (this.attachments == null) {
-            this.attachments = new HashMap<String, String>();
+            this.attachments = new HashMap<>();
         }
         this.attachments.putAll(attachments);
     }

dubbo-config/dubbo-config-api/src/main/java/org/apache/dubbo/config/ServiceConfig.java

@@ -128,7 +128,7 @@ public class ServiceConfig<T> extends ServiceConfigBase<T> {
     /**
      * A random port cache, the different protocols who have no port specified have different random port
      */
-    private static final Map<String, Integer> RANDOM_PORT_MAP = new HashMap<String, Integer>();
+    private static final Map<String, Integer> RANDOM_PORT_MAP = new HashMap<>();
 
     private Protocol protocolSPI;
 
@@ -651,7 +651,7 @@ public class ServiceConfig<T> extends ServiceConfigBase<T> {
 
     private Map<String, String> buildAttributes(ProtocolConfig protocolConfig) {
 
-        Map<String, String> map = new HashMap<String, String>();
+        Map<String, String> map = new HashMap<>();
         map.put(SIDE_KEY, PROVIDER_SIDE);
 
         // append params with basic configs,

dubbo-config/dubbo-config-api/src/main/java/org/apache/dubbo/config/utils/ConfigValidationUtils.java

@@ -209,7 +209,7 @@ public class ConfigValidationUtils {
                     address = ANYHOST_VALUE;
                 }
                 if (!RegistryConfig.NO_AVAILABLE.equalsIgnoreCase(address)) {
-                    Map<String, String> map = new HashMap<String, String>();
+                    Map<String, String> map = new HashMap<>();
                     AbstractConfig.appendParameters(map, application);
                     AbstractConfig.appendParameters(map, config);
                     map.put(PATH_KEY, RegistryService.class.getName());
@@ -309,7 +309,7 @@ public class ConfigValidationUtils {
     }
 
     public static URL loadMonitor(AbstractInterfaceConfig interfaceConfig, URL registryURL) {
-        Map<String, String> map = new HashMap<String, String>();
+        Map<String, String> map = new HashMap<>();
         map.put(INTERFACE_KEY, MonitorService.class.getName());
         AbstractInterfaceConfig.appendRuntimeParameters(map);
         // set ip

dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/AbstractAnnotationBeanPostProcessor.java

@@ -78,8 +78,7 @@ public abstract class AbstractAnnotationBeanPostProcessor
     private final Class<? extends Annotation>[] annotationTypes;
 
     private final ConcurrentMap<String, AbstractAnnotationBeanPostProcessor.AnnotatedInjectionMetadata>
-            injectionMetadataCache = new ConcurrentHashMap<
+            injectionMetadataCache = new ConcurrentHashMap<>(CACHE_SIZE);
-                    String, AbstractAnnotationBeanPostProcessor.AnnotatedInjectionMetadata>(CACHE_SIZE);
 
     private ConfigurableListableBeanFactory beanFactory;
 
@@ -98,7 +97,7 @@ public abstract class AbstractAnnotationBeanPostProcessor
     }
 
     private static <T> Collection<T> combine(Collection<? extends T>... elements) {
-        List<T> allElements = new ArrayList<T>();
+        List<T> allElements = new ArrayList<>();
         for (Collection<? extends T> e : elements) {
             allElements.addAll(e);
         }

dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/util/AnnotationUtils.java

@@ -87,7 +87,7 @@ public abstract class AnnotationUtils {
 
         Set<String> ignoreAttributeNamesSet = new HashSet<>(Arrays.asList(ignoreAttributeNames));
 
-        Map<String, Object> actualAttributes = new LinkedHashMap<String, Object>();
+        Map<String, Object> actualAttributes = new LinkedHashMap<>();
 
         for (Map.Entry<String, Object> annotationAttribute : annotationAttributes.entrySet()) {
 
@@ -143,7 +143,7 @@ public abstract class AnnotationUtils {
 
         if (ignoreDefaultValue && !isEmpty(annotationAttributes)) {
 
-            List<String> attributeNamesToIgnore = new LinkedList<String>(asList(ignoreAttributeNames));
+            List<String> attributeNamesToIgnore = new LinkedList<>(asList(ignoreAttributeNames));
 
             for (Map.Entry<String, Object> annotationAttribute : annotationAttributes.entrySet()) {
                 String attributeName = annotationAttribute.getKey();

dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/util/PropertySourcesUtils.java

@@ -103,7 +103,7 @@ public abstract class PropertySourcesUtils {
     public static Map<String, Object> getSubProperties(
             PropertySources propertySources, PropertyResolver propertyResolver, String prefix) {
 
-        Map<String, Object> subProperties = new LinkedHashMap<String, Object>();
+        Map<String, Object> subProperties = new LinkedHashMap<>();
 
         String normalizedPrefix = normalizePrefix(prefix);
 

dubbo-container/dubbo-container-api/src/main/java/org/apache/dubbo/container/Main.java

@@ -60,7 +60,7 @@ public class Main {
                 args = COMMA_SPLIT_PATTERN.split(config);
             }
 
-            final List<Container> containers = new ArrayList<Container>();
+            final List<Container> containers = new ArrayList<>();
             for (int i = 0; i < args.length; i++) {
                 containers.add(LOADER.getExtension(args[i]));
             }

dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/support/AbstractCacheFactory.java

@@ -42,7 +42,7 @@ public abstract class AbstractCacheFactory implements CacheFactory {
     /**
      * This is used to store factory level-1 cached data.
      */
-    private final ConcurrentMap<String, Cache> caches = new ConcurrentHashMap<String, Cache>();
+    private final ConcurrentMap<String, Cache> caches = new ConcurrentHashMap<>();
 
     private final Object MONITOR = new Object();
 

dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/support/expiring/ExpiringMap.java

@@ -158,7 +158,7 @@ public class ExpiringMap<K, V> implements Map<K, V> {
 
     @Override
     public Collection<V> values() {
-        List<V> list = new ArrayList<V>();
+        List<V> list = new ArrayList<>();
         Set<Entry<K, ExpiryObject>> delegatedSet = delegateMap.entrySet();
         for (Entry<K, ExpiryObject> entry : delegatedSet) {
             ExpiryObject value = entry.getValue();

dubbo-metadata/dubbo-metadata-report-nacos/src/main/java/org/apache/dubbo/metadata/store/nacos/NacosMetadataReport.java

@@ -258,7 +258,7 @@ public class NacosMetadataReport extends AbstractMetadataReport {
         if (StringUtils.isEmpty(content)) {
             return Collections.emptyList();
         }
-        return new ArrayList<String>(Arrays.asList(URL.decode(content)));
+        return new ArrayList<>(Arrays.asList(URL.decode(content)));
     }
 
     @Override

dubbo-monitor/dubbo-monitor-api/src/main/java/org/apache/dubbo/monitor/support/AbstractMonitorFactory.java

@@ -53,9 +53,9 @@ public abstract class AbstractMonitorFactory implements MonitorFactory {
     /**
      * The monitor centers Map<RegistryAddress, Registry>
      */
-    private static final Map<String, Monitor> MONITORS = new ConcurrentHashMap<String, Monitor>();
+    private static final Map<String, Monitor> MONITORS = new ConcurrentHashMap<>();
 
-    private static final Map<String, Future<Monitor>> FUTURES = new ConcurrentHashMap<String, Future<Monitor>>();
+    private static final Map<String, Future<Monitor>> FUTURES = new ConcurrentHashMap<>();
 
     /**
      * The monitor create executor

dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/command/decoder/HttpCommandDecoder.java

@@ -46,7 +46,7 @@ public class HttpCommandDecoder {
                         commandContext = CommandContextFactory.newInstance(name);
                         commandContext.setHttp(true);
                     } else {
-                        List<String> valueList = new ArrayList<String>();
+                        List<String> valueList = new ArrayList<>();
                         for (List<String> values :
                                 queryStringDecoder.parameters().values()) {
                             valueList.addAll(values);
@@ -56,7 +56,7 @@ public class HttpCommandDecoder {
                     }
                 } else if (request.method() == HttpMethod.POST) {
                     HttpPostRequestDecoder httpPostRequestDecoder = new HttpPostRequestDecoder(request);
-                    List<String> valueList = new ArrayList<String>();
+                    List<String> valueList = new ArrayList<>();
                     for (InterfaceHttpData interfaceHttpData : httpPostRequestDecoder.getBodyHttpDatas()) {
                         if (interfaceHttpData.getHttpDataType() == InterfaceHttpData.HttpDataType.Attribute) {
                             Attribute attribute = (Attribute) interfaceHttpData;

dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/command/impl/CountTelnet.java

@@ -155,8 +155,8 @@ public class CountTelnet implements BaseCommand {
 
     private String count(Invoker<?> invoker, String method) {
         URL url = invoker.getUrl();
-        List<List<String>> table = new ArrayList<List<String>>();
+        List<List<String>> table = new ArrayList<>();
-        List<String> header = new ArrayList<String>();
+        List<String> header = new ArrayList<>();
         header.add("method");
         header.add("total");
         header.add("failed");
@@ -188,7 +188,7 @@ public class CountTelnet implements BaseCommand {
     }
 
     private List<String> createRow(String methodName, RpcStatus count) {
-        List<String> row = new ArrayList<String>();
+        List<String> row = new ArrayList<>();
         row.add(methodName);
         row.add(String.valueOf(count.getTotal()));
         row.add(String.valueOf(count.getFailed()));

dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/command/util/CommandHelper.java

@@ -46,7 +46,7 @@ public class CommandHelper {
     public List<Class<?>> getAllCommandClass() {
         final Set<String> commandList =
                 frameworkModel.getExtensionLoader(BaseCommand.class).getSupportedExtensions();
-        final List<Class<?>> classes = new ArrayList<Class<?>>();
+        final List<Class<?>> classes = new ArrayList<>();
 
         for (String commandName : commandList) {
             BaseCommand command =

dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TLadder.java

@@ -35,7 +35,7 @@ public class TLadder implements TComponent {
     // indent length
     private static final int INDENT_STEP = 2;
 
-    private final List<String> items = new LinkedList<String>();
+    private final List<String> items = new LinkedList<>();
 
     @Override
     public String rendering() {

dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TTable.java

@@ -299,7 +299,7 @@ public class TTable implements TComponent {
         private final Align align;
 
         // data rows
-        private final List<String> rows = new ArrayList<String>();
+        private final List<String> rows = new ArrayList<>();
 
         public ColumnDefine(int width, boolean isAutoResize, Align align) {
             this.width = width;

dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TTree.java

@@ -181,7 +181,7 @@ public class TTree implements TComponent {
         /**
          * child nodes
          */
-        final List<Node> children = new ArrayList<Node>();
+        final List<Node> children = new ArrayList<>();
 
         /**
          * begin timestamp

dubbo-plugin/dubbo-reactive/src/main/java/org/apache/dubbo/reactive/calls/ReactorServerCalls.java

@@ -83,7 +83,7 @@ public final class ReactorServerCalls {
     public static <T, R> StreamObserver<T> manyToOne(
             StreamObserver<R> responseObserver, Function<Flux<T>, Mono<R>> func) {
         ServerTripleReactorPublisher<T> serverPublisher =
-                new ServerTripleReactorPublisher<T>((CallStreamObserver<R>) responseObserver);
+                new ServerTripleReactorPublisher<>((CallStreamObserver<R>) responseObserver);
         try {
             Mono<R> responseMono = func.apply(Flux.from(serverPublisher));
             responseMono.subscribe(
@@ -118,7 +118,7 @@ public final class ReactorServerCalls {
             StreamObserver<R> responseObserver, Function<Flux<T>, Flux<R>> func) {
         // responseObserver is also a subscription of publisher, we can use it to request more data
         ServerTripleReactorPublisher<T> serverPublisher =
-                new ServerTripleReactorPublisher<T>((CallStreamObserver<R>) responseObserver);
+                new ServerTripleReactorPublisher<>((CallStreamObserver<R>) responseObserver);
         try {
             Flux<R> responseFlux = func.apply(Flux.from(serverPublisher));
             ServerTripleReactorSubscriber<R> serverSubscriber =

dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/integration/InterfaceCompatibleRegistryProtocol.java

@@ -75,6 +75,6 @@ public class InterfaceCompatibleRegistryProtocol extends RegistryProtocol {
             URL url,
             URL consumerUrl) {
         //        ClusterInvoker<T> invoker = getInvoker(cluster, registry, type, url);
-        return new MigrationInvoker<T>(registryProtocol, cluster, registry, type, url, consumerUrl);
+        return new MigrationInvoker<>(registryProtocol, cluster, registry, type, url, consumerUrl);
     }
 }

dubbo-registry/dubbo-registry-multicast/src/main/java/org/apache/dubbo/registry/multicast/MulticastRegistry.java

@@ -82,7 +82,7 @@ public class MulticastRegistry extends FailbackRegistry {
 
     private final int multicastPort;
 
-    private final ConcurrentMap<URL, Set<URL>> received = new ConcurrentHashMap<URL, Set<URL>>();
+    private final ConcurrentMap<URL, Set<URL>> received = new ConcurrentHashMap<>();
 
     private final ScheduledExecutorService cleanExecutor =
             Executors.newScheduledThreadPool(1, new NamedThreadFactory("DubboMulticastRegistryCleanTimer", true));
@@ -361,7 +361,7 @@ public class MulticastRegistry extends FailbackRegistry {
                 }
                 if (urls == null || urls.isEmpty()) {
                     if (urls == null) {
-                        urls = new ConcurrentHashSet<URL>();
+                        urls = new ConcurrentHashSet<>();
                     }
                     URL empty = url.setProtocol(EMPTY_PROTOCOL);
                     urls.add(empty);
@@ -380,7 +380,7 @@ public class MulticastRegistry extends FailbackRegistry {
     }
 
     private List<URL> toList(Set<URL> urls) {
-        List<URL> list = new ArrayList<URL>();
+        List<URL> list = new ArrayList<>();
         if (CollectionUtils.isNotEmpty(urls)) {
             list.addAll(urls);
         }

dubbo-registry/dubbo-registry-multiple/src/main/java/org/apache/dubbo/registry/multiple/MultipleRegistry.java

@@ -268,7 +268,7 @@ public class MultipleRegistry extends AbstractRegistry {
 
     protected static class MultipleNotifyListenerWrapper implements NotifyListener {
 
-        Map<URL, SingleNotifyListener> registryMap = new ConcurrentHashMap<URL, SingleNotifyListener>(4);
+        Map<URL, SingleNotifyListener> registryMap = new ConcurrentHashMap<>(4);
         NotifyListener sourceNotifyListener;
 
         public MultipleNotifyListenerWrapper(NotifyListener sourceNotifyListener) {

dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/exchange/support/ReplierDispatcher.java

@@ -30,7 +30,7 @@ public class ReplierDispatcher implements Replier<Object> {
 
     private final Replier<?> defaultReplier;
 
-    private final Map<Class<?>, Replier<?>> repliers = new ConcurrentHashMap<Class<?>, Replier<?>>();
+    private final Map<Class<?>, Replier<?>> repliers = new ConcurrentHashMap<>();
 
     public ReplierDispatcher() {
         this(null, null);

dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/exchange/support/header/HeaderExchangeServer.java

@@ -161,7 +161,7 @@ public class HeaderExchangeServer implements ExchangeServer {
 
     @Override
     public Collection<ExchangeChannel> getExchangeChannels() {
-        Collection<ExchangeChannel> exchangeChannels = new ArrayList<ExchangeChannel>();
+        Collection<ExchangeChannel> exchangeChannels = new ArrayList<>();
         Collection<Channel> channels = server.getChannels();
         if (CollectionUtils.isNotEmpty(channels)) {
             for (Channel channel : channels) {

dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/telnet/codec/TelnetCodec.java

@@ -283,7 +283,7 @@ public class TelnetCodec extends TransportCodec {
         String result = toString(message, getCharset(channel));
         if (result.trim().length() > 0) {
             if (history == null) {
-                history = new LinkedList<String>();
+                history = new LinkedList<>();
                 channel.setAttribute(HISTORY_LIST_KEY, history);
             }
             if (history.isEmpty()) {

dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/telnet/support/command/HelpTelnetHandler.java

@@ -73,12 +73,12 @@ public class HelpTelnetHandler implements TelnetHandler {
     }
 
     private String generateForAllCommand(Channel channel) {
-        List<List<String>> table = new ArrayList<List<String>>();
+        List<List<String>> table = new ArrayList<>();
         List<TelnetHandler> handlers = extensionLoader.getActivateExtension(channel.getUrl(), "telnet");
         if (CollectionUtils.isNotEmpty(handlers)) {
             for (TelnetHandler handler : handlers) {
                 Help help = handler.getClass().getAnnotation(Help.class);
-                List<String> row = new ArrayList<String>();
+                List<String> row = new ArrayList<>();
                 String parameter = " " + extensionLoader.getExtensionName(handler) + " "
                         + (help != null ? help.parameter().replace("\r\n", " ").replace("\n", " ") : "");
                 row.add(parameter.length() > 55 ? parameter.substring(0, 55) + "..." : parameter);

dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/telnet/support/command/StatusTelnetHandler.java

@@ -53,8 +53,8 @@ public class StatusTelnetHandler implements TelnetHandler {
         if ("-l".equals(message)) {
             List<StatusChecker> checkers = extensionLoader.getActivateExtension(channel.getUrl(), STATUS_KEY);
             String[] header = new String[] {"resource", "status", "message"};
-            List<List<String>> table = new ArrayList<List<String>>();
+            List<List<String>> table = new ArrayList<>();
-            Map<String, Status> statuses = new HashMap<String, Status>();
+            Map<String, Status> statuses = new HashMap<>();
             if (CollectionUtils.isNotEmpty(checkers)) {
                 for (StatusChecker checker : checkers) {
                     String name = extensionLoader.getExtensionName(checker);
@@ -66,7 +66,7 @@ public class StatusTelnetHandler implements TelnetHandler {
                     }
                     statuses.put(name, stat);
                     if (stat.getLevel() != null && stat.getLevel() != Status.Level.UNKNOWN) {
-                        List<String> row = new ArrayList<String>();
+                        List<String> row = new ArrayList<>();
                         row.add(name);
                         row.add(String.valueOf(stat.getLevel()));
                         row.add(stat.getMessage() == null ? "" : stat.getMessage());
@@ -75,7 +75,7 @@ public class StatusTelnetHandler implements TelnetHandler {
                 }
             }
             Status stat = StatusUtils.getSummaryStatus(statuses);
-            List<String> row = new ArrayList<String>();
+            List<String> row = new ArrayList<>();
             row.add("summary");
             row.add(String.valueOf(stat.getLevel()));
             row.add(stat.getMessage());
@@ -85,7 +85,7 @@ public class StatusTelnetHandler implements TelnetHandler {
             return "Unsupported parameter " + message + " for status.";
         }
         String status = channel.getUrl().getParameter("status");
-        Map<String, Status> statuses = new HashMap<String, Status>();
+        Map<String, Status> statuses = new HashMap<>();
         if (StringUtils.isNotEmpty(status)) {
             String[] ss = COMMA_SPLIT_PATTERN.split(status);
             for (String s : ss) {

dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/transport/CodecSupport.java

@@ -42,9 +42,9 @@ import static org.apache.dubbo.common.constants.LoggerCodeConstants.TRANSPORT_FA
 
 public class CodecSupport {
     private static final ErrorTypeAwareLogger logger = LoggerFactory.getErrorTypeAwareLogger(CodecSupport.class);
-    private static Map<Byte, Serialization> ID_SERIALIZATION_MAP = new HashMap<Byte, Serialization>();
+    private static Map<Byte, Serialization> ID_SERIALIZATION_MAP = new HashMap<>();
-    private static Map<Byte, String> ID_SERIALIZATIONNAME_MAP = new HashMap<Byte, String>();
+    private static Map<Byte, String> ID_SERIALIZATIONNAME_MAP = new HashMap<>();
-    private static Map<String, Byte> SERIALIZATIONNAME_ID_MAP = new HashMap<String, Byte>();
+    private static Map<String, Byte> SERIALIZATIONNAME_ID_MAP = new HashMap<>();
     // Cache null object serialize results, for heartbeat request/response serialize use.
     private static ConcurrentMap<Byte, byte[]> ID_NULLBYTES_MAP = new ConcurrentHashMap<>();
 

dubbo-remoting/dubbo-remoting-http/src/main/java/org/apache/dubbo/remoting/http/RequestTemplate.java

@@ -35,8 +35,8 @@ public class RequestTemplate implements Serializable {
     public static final String ENCODING_DEFLATE = "deflate";
     private static final List<String> EMPTY_ARRAYLIST = new ArrayList<>();
 
-    private final Map<String, Collection<String>> queries = new LinkedHashMap<String, Collection<String>>();
+    private final Map<String, Collection<String>> queries = new LinkedHashMap<>();
-    private final Map<String, Collection<String>> headers = new LinkedHashMap<String, Collection<String>>();
+    private final Map<String, Collection<String>> headers = new LinkedHashMap<>();
     private String httpMethod;
     private String path;
     private String address;

dubbo-remoting/dubbo-remoting-http/src/main/java/org/apache/dubbo/remoting/http/servlet/DispatcherServlet.java

@@ -33,7 +33,7 @@ import java.util.concurrent.ConcurrentHashMap;
 public class DispatcherServlet extends HttpServlet {
 
     private static final long serialVersionUID = 5766349180380479888L;
-    private static final Map<Integer, HttpHandler> HANDLERS = new ConcurrentHashMap<Integer, HttpHandler>();
+    private static final Map<Integer, HttpHandler> HANDLERS = new ConcurrentHashMap<>();
     private static DispatcherServlet INSTANCE;
 
     public DispatcherServlet() {

dubbo-remoting/dubbo-remoting-http/src/main/java/org/apache/dubbo/remoting/http/servlet/ServletManager.java

@@ -30,7 +30,7 @@ public class ServletManager {
 
     private static final ServletManager INSTANCE = new ServletManager();
 
-    private final Map<Integer, ServletContext> contextMap = new ConcurrentHashMap<Integer, ServletContext>();
+    private final Map<Integer, ServletContext> contextMap = new ConcurrentHashMap<>();
 
     public static ServletManager getInstance() {
         return INSTANCE;

dubbo-remoting/dubbo-remoting-netty/src/main/java/org/apache/dubbo/remoting/transport/netty/NettyChannel.java

@@ -43,11 +43,11 @@ final class NettyChannel extends AbstractChannel {
     private static final ErrorTypeAwareLogger logger = LoggerFactory.getErrorTypeAwareLogger(NettyChannel.class);
 
     private static final ConcurrentMap<org.jboss.netty.channel.Channel, NettyChannel> CHANNEL_MAP =
-            new ConcurrentHashMap<org.jboss.netty.channel.Channel, NettyChannel>();
+            new ConcurrentHashMap<>();
 
     private final org.jboss.netty.channel.Channel channel;
 
-    private final Map<String, Object> attributes = new ConcurrentHashMap<String, Object>();
+    private final Map<String, Object> attributes = new ConcurrentHashMap<>();
 
     private NettyChannel(org.jboss.netty.channel.Channel channel, URL url, ChannelHandler handler) {
         super(url, handler);

dubbo-remoting/dubbo-remoting-netty/src/main/java/org/apache/dubbo/remoting/transport/netty/NettyHandler.java

@@ -42,7 +42,7 @@ public class NettyHandler extends SimpleChannelHandler {
 
     private static final Logger logger = LoggerFactory.getLogger(NettyHandler.class);
 
-    private final Map<String, Channel> channels = new ConcurrentHashMap<String, Channel>(); // <ip:port, channel>
+    private final Map<String, Channel> channels = new ConcurrentHashMap<>(); // <ip:port, channel>
 
     private final URL url;
 

dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/NettyChannel.java

@@ -61,14 +61,13 @@ final class NettyChannel extends AbstractChannel {
     /**
      * the cache for netty channel and dubbo channel
      */
-    private static final ConcurrentMap<Channel, NettyChannel> CHANNEL_MAP =
+    private static final ConcurrentMap<Channel, NettyChannel> CHANNEL_MAP = new ConcurrentHashMap<>();
-            new ConcurrentHashMap<Channel, NettyChannel>();
     /**
      * netty channel
      */
     private final Channel channel;
 
-    private final Map<String, Object> attributes = new ConcurrentHashMap<String, Object>();
+    private final Map<String, Object> attributes = new ConcurrentHashMap<>();
 
     private final AtomicBoolean active = new AtomicBoolean(false);
 

dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/RpcServiceContext.java

@@ -459,7 +459,7 @@ public class RpcServiceContext extends RpcContext {
     public RpcServiceContext setInvokers(List<Invoker<?>> invokers) {
         this.invokers = invokers;
         if (CollectionUtils.isNotEmpty(invokers)) {
-            List<URL> urls = new ArrayList<URL>(invokers.size());
+            List<URL> urls = new ArrayList<>(invokers.size());
             for (Invoker<?> invoker : invokers) {
                 urls.add(invoker.getUrl());
             }

dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/RpcStatus.java

@@ -33,13 +33,12 @@ import java.util.concurrent.atomic.AtomicLong;
  */
 public class RpcStatus {
 
-    private static final ConcurrentMap<String, RpcStatus> SERVICE_STATISTICS =
+    private static final ConcurrentMap<String, RpcStatus> SERVICE_STATISTICS = new ConcurrentHashMap<>();
-            new ConcurrentHashMap<String, RpcStatus>();
 
     private static final ConcurrentMap<String, ConcurrentMap<String, RpcStatus>> METHOD_STATISTICS =
-            new ConcurrentHashMap<String, ConcurrentMap<String, RpcStatus>>();
+            new ConcurrentHashMap<>();
 
-    private final ConcurrentMap<String, Object> values = new ConcurrentHashMap<String, Object>();
+    private final ConcurrentMap<String, Object> values = new ConcurrentHashMap<>();
 
     private final AtomicInteger active = new AtomicInteger();
     private final AtomicLong total = new AtomicLong();

dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/filter/DeprecatedFilter.java

@@ -44,7 +44,7 @@ public class DeprecatedFilter implements Filter {
 
     private static final ErrorTypeAwareLogger LOGGER = LoggerFactory.getErrorTypeAwareLogger(DeprecatedFilter.class);
 
-    private static final Set<String> LOGGED = new ConcurrentHashSet<String>();
+    private static final Set<String> LOGGED = new ConcurrentHashSet<>();
 
     @Override
     public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {

dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/filter/tps/DefaultTPSLimiter.java

@@ -35,7 +35,7 @@ import static org.apache.dubbo.rpc.Constants.TPS_LIMIT_RATE_KEY;
  */
 public class DefaultTPSLimiter implements TPSLimiter {
 
-    private final ConcurrentMap<String, StatItem> stats = new ConcurrentHashMap<String, StatItem>();
+    private final ConcurrentMap<String, StatItem> stats = new ConcurrentHashMap<>();
 
     @Override
     public boolean isAllowable(URL url, Invocation invocation) {

dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/protocol/AbstractProxyProtocol.java

@@ -50,7 +50,7 @@ import static org.apache.dubbo.common.constants.LoggerCodeConstants.PROTOCOL_UNS
  */
 public abstract class AbstractProxyProtocol extends AbstractProtocol {
 
-    private final List<Class<?>> rpcExceptions = new CopyOnWriteArrayList<Class<?>>();
+    private final List<Class<?>> rpcExceptions = new CopyOnWriteArrayList<>();
 
     protected ProxyFactory proxyFactory;
 

dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/protocol/ProtocolListenerWrapper.java

@@ -74,8 +74,7 @@ public class ProtocolListenerWrapper implements Protocol {
                     .getBeanFactory()
                     .getBean(InjvmExporterListener.class));
         }
-        return new ListenerExporterWrapper<T>(
+        return new ListenerExporterWrapper<>(protocol.export(invoker), Collections.unmodifiableList(exporterListeners));
-                protocol.export(invoker), Collections.unmodifiableList(exporterListeners));
     }
 
     @Override

dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/support/MockInvoker.java

@@ -47,8 +47,8 @@ import static org.apache.dubbo.rpc.Constants.THROW_PREFIX;
 
 public final class MockInvoker<T> implements Invoker<T> {
     private final ProxyFactory proxyFactory;
-    private static final Map<String, Invoker<?>> MOCK_MAP = new ConcurrentHashMap<String, Invoker<?>>();
+    private static final Map<String, Invoker<?>> MOCK_MAP = new ConcurrentHashMap<>();
-    private static final Map<String, Throwable> THROWABLE_MAP = new ConcurrentHashMap<String, Throwable>();
+    private static final Map<String, Throwable> THROWABLE_MAP = new ConcurrentHashMap<>();
 
     private final URL url;
     private final Class<T> type;

dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/DubboProtocol.java

@@ -339,7 +339,7 @@ public class DubboProtocol extends AbstractProtocol {
 
         // export service.
         String key = serviceKey(url);
-        DubboExporter<T> exporter = new DubboExporter<T>(invoker, key, exporterMap);
+        DubboExporter<T> exporter = new DubboExporter<>(invoker, key, exporterMap);
 
         // export a stub service for dispatching event
         boolean isStubSupportEvent = url.getParameter(STUB_EVENT_KEY, DEFAULT_STUB_EVENT);
@@ -443,7 +443,7 @@ public class DubboProtocol extends AbstractProtocol {
         optimizeSerialization(url);
 
         // create rpc invoker.
-        DubboInvoker<T> invoker = new DubboInvoker<T>(serviceType, url, getClients(url), invokers);
+        DubboInvoker<T> invoker = new DubboInvoker<>(serviceType, url, getClients(url), invokers);
         invokers.add(invoker);
 
         return invoker;

dubbo-rpc/dubbo-rpc-injvm/src/main/java/org/apache/dubbo/rpc/protocol/injvm/InjvmProtocol.java

@@ -75,12 +75,12 @@ public class InjvmProtocol extends AbstractProtocol {
 
     @Override
     public <T> Exporter<T> export(Invoker<T> invoker) throws RpcException {
-        return new InjvmExporter<T>(invoker, invoker.getUrl().getServiceKey(), exporterMap);
+        return new InjvmExporter<>(invoker, invoker.getUrl().getServiceKey(), exporterMap);
     }
 
     @Override
     public <T> Invoker<T> protocolBindingRefer(Class<T> serviceType, URL url) throws RpcException {
-        return new InjvmInvoker<T>(serviceType, url, url.getServiceKey(), exporterMap);
+        return new InjvmInvoker<>(serviceType, url, url.getServiceKey(), exporterMap);
     }
 
     public boolean isInjvmRefer(URL url) {

dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/RestProtocol.java

@@ -134,7 +134,7 @@ public class RestProtocol extends AbstractProtocol {
                 MetadataResolver.resolveConsumerServiceMetadata(type, url, contextPathFromUrl);
 
         Invoker<T> invoker =
-                new RestInvoker<T>(type, url, refClient, httpConnectionPreBuildIntercepts, serviceRestMetadata);
+                new RestInvoker<>(type, url, refClient, httpConnectionPreBuildIntercepts, serviceRestMetadata);
 
         invokers.add(invoker);
         return invoker;

dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/ViolationReport.java

@@ -42,7 +42,7 @@ public class ViolationReport implements Serializable {
 
     public void addConstraintViolation(RestConstraintViolation constraintViolation) {
         if (constraintViolations == null) {
-            constraintViolations = new LinkedList<RestConstraintViolation>();
+            constraintViolations = new LinkedList<>();
         }
         constraintViolations.add(constraintViolation);
     }

dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/extension/resteasy/filter/DubboPreMatchContainerRequestContext.java

@@ -82,7 +82,7 @@ public class DubboPreMatchContainerRequestContext implements SuspendableContaine
 
     @Override
     public Collection<String> getPropertyNames() {
-        ArrayList<String> names = new ArrayList<String>();
+        ArrayList<String> names = new ArrayList<>();
         Enumeration<String> enames = httpRequest.getAttributeNames();
         while (enames.hasMoreElements()) {
             names.add(enames.nextElement());

dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/util/ReflectUtils.java

@@ -115,7 +115,7 @@ public class ReflectUtils {
         } catch (Exception e) {
 
         }
-        return new ArrayList<Constructor<?>>(methods);
+        return new ArrayList<>(methods);
     }
 
     private static void filterConstructMethod(Set<Constructor<?>> methods, Constructor<?>[] declaredMethods) {

dubbo-rpc/dubbo-rpc-triple/src/main/java/org/apache/dubbo/rpc/protocol/tri/TriHttp2RemoteFlowController.java

@@ -306,7 +306,7 @@ public class TriHttp2RemoteFlowController implements Http2RemoteFlowController {
 
         FlowState(Http2Stream stream) {
             this.stream = stream;
-            pendingWriteQueue = new ArrayDeque<FlowControlled>(2);
+            pendingWriteQueue = new ArrayDeque<>(2);
         }
 
         /**

dubbo-test/dubbo-test-common/src/main/java/org/apache/dubbo/test/common/SysProps.java

@@ -24,7 +24,7 @@ import java.util.Map;
  */
 public class SysProps {
 
-    private static Map<String, String> map = new LinkedHashMap<String, String>();
+    private static Map<String, String> map = new LinkedHashMap<>();
 
     public static void reset() {
         map.clear();