extract method: don't mark final if used in anonymous but effectively final in java 8 (IDEA-165642)

java/java-impl/src/com/intellij/refactoring/extractMethod/ExtractMethodProcessor.java

@@ -1169,7 +1169,7 @@ public class ExtractMethodProcessor implements MatchProvider {
           }
         });
       }
-      else {
+      else if (!PsiUtil.isLanguageLevel8OrHigher(method)){
         method.accept(new JavaRecursiveElementVisitor() {
           @Override public void visitReferenceExpression(PsiReferenceExpression expression) {
             final PsiElement resolved = expression.resolve();

java/java-tests/testData/refactoring/extractMethod/DontMakeParametersFinalDueToUsagesInsideAnonymous.java

@@ -0,0 +1,20 @@
+class Box {
+  private void test(String str1, String str2) {
+    Data data = <selection>new Data() {
+      @Override
+      public String getA() {
+        return str1;
+      }
+      @Override
+      public String getB() {
+        return str2;
+      }
+    }</selection>;
+    System.out.println(data);
+  }
+
+  static interface Data {
+    String getA();
+    String getB();
+  }
+}

java/java-tests/testData/refactoring/extractMethod/DontMakeParametersFinalDueToUsagesInsideAnonymous_after.java

@@ -0,0 +1,27 @@
+import org.jetbrains.annotations.NotNull;
+
+class Box {
+  private void test(String str1, String str2) {
+    Data data = newMethod(str1, str2);
+    System.out.println(data);
+  }
+
+    @NotNull
+    private Data newMethod(String str1, String str2) {
+        return new Data() {
+          @Override
+          public String getA() {
+            return str1;
+          }
+          @Override
+          public String getB() {
+            return str2;
+          }
+        };
+    }
+
+    static interface Data {
+    String getA();
+    String getB();
+  }
+}

java/java-tests/testSrc/com/intellij/refactoring/ExtractMethodTest.java

@@ -904,6 +904,10 @@ public class ExtractMethodTest extends LightCodeInsightTestCase {
     checkResultByFile(BASE_PATH + getTestName(false) + "_after.java");
   }
 
+  public void testDontMakeParametersFinalDueToUsagesInsideAnonymous() throws Exception {
+    doTest();
+  }
+
   private void doTestDisabledParam() throws PrepareFailedException {
     final CodeStyleSettings settings = CodeStyleSettingsManager.getSettings(getProject());
     settings.ELSE_ON_NEW_LINE = true;