src/java.security.sasl/share/classes/com/sun/security/sasl/digest/DigestMD5Base.java

rev 10552 : 8055723[core]: Replace concat String to append in StringBuilder parameters
Contributed-by: Otavio Santana <otaviojava@java.net>

@@ -389,12 +389,11 @@
 
         StringBuilder digestString = new StringBuilder();
 
         for (int i = 0; i < digest.length; i ++) {
             if ((digest[i] & 0x000000ff) < 0x10) {
-                digestString.append("0"+
-                    Integer.toHexString(digest[i] & 0x000000ff));
+                digestString.append('0').append(Integer.toHexString(digest[i] & 0x000000ff));
             } else {
                 digestString.append(
                     Integer.toHexString(digest[i] & 0x000000ff));
             }
         }