Index: org/apache/jk/common/MsgAjp.java
===================================================================
--- org/apache/jk/common/MsgAjp.java	(revision 831814)
+++ org/apache/jk/common/MsgAjp.java	(working copy)
@@ -327,7 +327,7 @@
     // XXX Move to util package
 
     public static String hexLine( byte buf[], int start, int len ) {
-        StringBuffer sb=new StringBuffer();
+        StringBuilder sb=new StringBuilder();
         for( int i=start; i< start+16 ; i++ ) {
             if( i < len + 4)
                 sb.append( hex( buf[i] ) + " ");
Index: org/apache/jk/config/BaseJkConfig.java
===================================================================
--- org/apache/jk/config/BaseJkConfig.java	(revision 831814)
+++ org/apache/jk/config/BaseJkConfig.java	(working copy)
@@ -451,7 +451,7 @@
             patchPath.charAt(1) == ':') {
             char[] ca = patchPath.replace('/', '\\').toCharArray();
             char c;
-            StringBuffer sb = new StringBuffer();
+            StringBuilder sb = new StringBuilder();
 
             for (int i = 0; i < ca.length; i++) {
                 if ((ca[i] != '\\') ||
@@ -479,7 +479,7 @@
             path.length() >=3 &&
             path.indexOf(':') > 0) {
             char[] ca = patchPath.replace('/', '\\').toCharArray();
-            StringBuffer sb = new StringBuffer();
+            StringBuilder sb = new StringBuilder();
 
             for (int i = 0; i < ca.length; i++) {
                 if ((ca[i] != '\\') ||
Index: org/apache/jk/config/IISConfig.java
===================================================================
--- org/apache/jk/config/IISConfig.java	(revision 831814)
+++ org/apache/jk/config/IISConfig.java	(working copy)
@@ -289,7 +289,7 @@
 
     private String dubleSlash(String in) 
     {
-        StringBuffer sb = new StringBuffer();
+        StringBuilder sb = new StringBuilder();
         
         for(int i = 0 ; i < in.length() ; i++) {
             char ch = in.charAt(i);
Index: org/apache/jk/core/Msg.java
===================================================================
--- org/apache/jk/core/Msg.java	(revision 831814)
+++ org/apache/jk/core/Msg.java	(working copy)
@@ -126,7 +126,7 @@
     // XXX Move to util package
 
     public static String hexLine( byte buf[], int start, int len ) {
-        StringBuffer sb=new StringBuffer();
+        StringBuilder sb=new StringBuilder();
         for( int i=start; i< start+16 ; i++ ) {
             if( i < len + 4)
                 sb.append( hex( buf[i] ) + " ");