--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java	Fri Feb 27 18:20:33 2015 +0000
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java	Mon Mar 02 10:41:08 2015 +0530
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -212,6 +212,7 @@
     public boolean allowUnderscoreIdentifier() {
         return compareTo(JDK1_8) <= 0;
     }
+    public boolean allowPrivateInterfaceMethods() { return compareTo(JDK1_9) >= 0; }
     public static SourceVersion toSourceVersion(Source source) {
         switch(source) {
         case JDK1_2: