inserting paired brace for lambda body (following IDEA-CR-8127)

java/java-impl/src/com/intellij/codeInsight/editorActions/JavaTypedHandler.java

@@ -142,9 +142,10 @@ public class JavaTypedHandler extends TypedHandlerDelegate {
         }, "Insert block statement", null);
         return Result.STOP;
       }
-   
-      if (leaf != null && PsiTreeUtil.getParentOfType(PsiTreeUtil.prevVisibleLeaf(leaf), PsiNewExpression.class, true, 
-                                                      PsiCodeBlock.class, PsiMember.class) != null) {
+
+      PsiElement prevLeaf = leaf == null ? null : PsiTreeUtil.prevVisibleLeaf(leaf);
+      if (PsiUtil.isJavaToken(prevLeaf, JavaTokenType.ARROW) || 
+          PsiTreeUtil.getParentOfType(prevLeaf, PsiNewExpression.class, true, PsiCodeBlock.class, PsiMember.class) != null) {
         return Result.CONTINUE;
       }
 

java/java-tests/testData/codeInsight/typing/insertPairedBraceForLambdaBody_after.java

@@ -0,0 +1,5 @@
+class A {
+  void m() {
+    javax.swing.SwingUtilities.invokeLater(() -> {<caret>});
+  }
+}

java/java-tests/testData/codeInsight/typing/insertPairedBraceForLambdaBody_before.java

@@ -0,0 +1,5 @@
+class A {
+  void m() {
+    javax.swing.SwingUtilities.invokeLater(() -> <caret>);
+  }
+}

java/java-tests/testSrc/com/intellij/codeInsight/JavaTypingTest.java

@@ -98,6 +98,10 @@ public class JavaTypingTest extends LightPlatformCodeInsightFixtureTestCase {
     doTest('{');
   }
   
+  public void testInsertPairedBraceForLambdaBody() {
+    doTest('{');
+  }
+  
   private void doTest(char c) {
     myFixture.configureByFile(getTestName(true) + "_before.java");
     myFixture.type(c);