added another utility method.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@5066 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/Util.java

@@ -255,14 +255,21 @@ public class Util {
             out.write(buf,0,len);
     }
 
-    public static String[] tokenize(String s) {
-        StringTokenizer st = new StringTokenizer(s);
+    /**
+     * @since 1.145
+     */
+    public static String[] tokenize(String s,String delimiter) {
+        StringTokenizer st = new StringTokenizer(s,delimiter);
         String[] a = new String[st.countTokens()];
         for (int i = 0; st.hasMoreTokens(); i++)
             a[i] = st.nextToken();
         return a;
     }
 
+    public static String[] tokenize(String s) {
+        return tokenize(s," \t\n\r\f");
+    }
+
     public static String[] mapToEnv(Map<String,String> m) {
         String[] r = new String[m.size()];
         int idx=0;