diff -r d931e2237178 -r a026e34714ed jdk/src/java.base/share/classes/java/lang/Class.java
--- a/jdk/src/java.base/share/classes/java/lang/Class.java	Tue Apr 14 17:59:52 2015 +0300
+++ b/jdk/src/java.base/share/classes/java/lang/Class.java	Tue Apr 14 18:03:12 2015 +0300
@@ -1312,7 +1312,7 @@
         // e) Anonymous classes
 
 
-        // JVM Spec 4.8.6: A class must have an EnclosingMethod
+        // JVM Spec 4.7.7: A class must have an EnclosingMethod
         // attribute if and only if it is a local class or an
         // anonymous class.
         EnclosingMethodInfo enclosingInfo = getEnclosingMethodInfo();
@@ -1357,28 +1357,7 @@
             simpleName = getName();
             return simpleName.substring(simpleName.lastIndexOf('.')+1); // strip the package name
         }
-        // According to JLS3 "Binary Compatibility" (13.1) the binary
-        // name of non-package classes (not top level) is the binary
-        // name of the immediately enclosing class followed by a '$' followed by:
-        // (for nested and inner classes): the simple name.
-        // (for local classes): 1 or more digits followed by the simple name.
-        // (for anonymous classes): 1 or more digits.
-
-        // Since getSimpleBinaryName() will strip the binary name of
-        // the immediately enclosing class, we are now looking at a
-        // string that matches the regular expression "\$[0-9]*"
-        // followed by a simple name (considering the simple of an
-        // anonymous class to be the empty string).
-
-        // Remove leading "\$[0-9]*" from the name
-        int length = simpleName.length();
-        if (length < 1 || simpleName.charAt(0) != '$')
-            throw new InternalError("Malformed class name");
-        int index = 1;
-        while (index < length && isAsciiDigit(simpleName.charAt(index)))
-            index++;
-        // Eventually, this is the empty string iff this is an anonymous class
-        return simpleName.substring(index);
+        return simpleName;
     }
 
     /**
@@ -1489,20 +1468,20 @@
         Class<?> enclosingClass = getEnclosingClass();
         if (enclosingClass == null) // top level class
             return null;
-        // Otherwise, strip the enclosing class' name
-        try {
-            return getName().substring(enclosingClass.getName().length());
-        } catch (IndexOutOfBoundsException ex) {
-            throw new InternalError("Malformed class name", ex);
-        }
+        String name = getSimpleBinaryName0();
+        if (name == null) // anonymous class
+            return "";
+        return name;
     }
 
+    private native String getSimpleBinaryName0();
+
     /**
      * Returns {@code true} if this is a local class or an anonymous
      * class.  Returns {@code false} otherwise.
      */
     private boolean isLocalOrAnonymousClass() {
-        // JVM Spec 4.8.6: A class must have an EnclosingMethod
+        // JVM Spec 4.7.7: A class must have an EnclosingMethod
         // attribute if and only if it is a local class or an
         // anonymous class.
         return getEnclosingMethodInfo() != null;