--- a/jdk/src/share/classes/sun/tools/java/MethodSet.java	Mon Jun 16 08:09:30 2014 -0700
+++ b/jdk/src/share/classes/sun/tools/java/MethodSet.java	Mon Jun 16 17:45:26 2014 +0100
@@ -261,18 +261,18 @@
      */
     public String toString() {
         int len = size();
-        StringBuffer buf = new StringBuffer();
+        StringBuilder sb = new StringBuilder();
         Iterator all = iterator();
-        buf.append("{");
+        sb.append("{");
 
         while (all.hasNext()) {
-            buf.append(all.next().toString());
+            sb.append(all.next().toString());
             len--;
             if (len > 0) {
-                buf.append(", ");
+                sb.append(", ");
             }
         }
-        buf.append("}");
-        return buf.toString();
+        sb.append("}");
+        return sb.toString();
     }
 }