--- old/src/java.base/share/classes/sun/security/ssl/SupportedEllipticCurvesExtension.java	2014-08-26 11:21:20.000000000 +0800
+++ new/src/java.base/share/classes/sun/security/ssl/SupportedEllipticCurvesExtension.java	2014-08-26 11:21:19.000000000 +0800
@@ -113,7 +113,7 @@
     @Override
     public String toString() {
         StringBuilder sb = new StringBuilder();
-        sb.append("Extension " + type + ", curve names: {");
+        sb.append("Extension ").append(type).append(", curve names: {");
         boolean first = true;
         for (int curveId : curveIds) {
             if (first) {
@@ -138,7 +138,7 @@
             } else if (curveId == ARBITRARY_CHAR2) {
                 sb.append("arbitrary_explicit_char2_curves");
             } else {
-                sb.append("unknown curve " + curveId);
+                sb.append("unknown curve ").append(curveId);
             }
         }
         sb.append("}");