--- a/jdk/src/share/classes/java/io/RandomAccessFile.java	Mon Jun 16 08:09:30 2014 -0700
+++ b/jdk/src/share/classes/java/io/RandomAccessFile.java	Mon Jun 16 17:45:26 2014 +0100
@@ -890,7 +890,7 @@
      */
 
     public final String readLine() throws IOException {
-        StringBuffer input = new StringBuffer();
+        StringBuilder input = new StringBuilder();
         int c = -1;
         boolean eol = false;