replace annonymous inner class with lambdas

Author: kezhenxu94

src/main/java/org/apache/ibatis/executor/loader/ResultLoaderMap.java

@@ -234,15 +234,12 @@ private Configuration getConfiguration() {
         }
 
         if (!factoryMethod.isAccessible()) {
-          configurationObject = AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {
-            @Override
-            public Object run() throws Exception {
-              try {
-                factoryMethod.setAccessible(true);
-                return factoryMethod.invoke(null);
-              } finally {
-                factoryMethod.setAccessible(false);
-              }
+          configurationObject = AccessController.doPrivileged((PrivilegedExceptionAction<Object>) () -> {
+            try {
+              factoryMethod.setAccessible(true);
+              return factoryMethod.invoke(null);
+            } finally {
+              factoryMethod.setAccessible(false);
             }
           });
         } else {

src/test/java/org/apache/ibatis/builder/XmlMapperBuilderTest.java

@@ -174,9 +174,7 @@ void shouldFailedLoadXMLMapperFile() throws Exception {
     String resource = "org/apache/ibatis/builder/ProblemMapper.xml";
     try (InputStream inputStream = Resources.getResourceAsStream(resource)) {
       XMLMapperBuilder builder = new XMLMapperBuilder(inputStream, configuration, resource, configuration.getSqlFragments());
-      Exception exception = Assertions.assertThrows(BuilderException.class, () -> {
-        builder.parse();
-      });
+      Exception exception = Assertions.assertThrows(BuilderException.class, builder::parse);
       Assertions.assertTrue(exception.getMessage().contains("Error parsing Mapper XML. The XML location is 'org/apache/ibatis/builder/ProblemMapper.xml'"));
     }
   }

src/test/java/org/apache/ibatis/submitted/blocking_cache/BlockingCacheTest.java

@@ -52,13 +52,7 @@ void testBlockingCache() {
     long init = System.currentTimeMillis();
 
     for (int i = 0; i < 2; i++) {
-      defaultThreadPool.execute(new Runnable() {
-
-        @Override
-        public void run() {
-          accessDB();
-        }
-      });
+      defaultThreadPool.execute(this::accessDB);
     }
 
     defaultThreadPool.shutdown();