String Manipulation in JSP

Gidday All,
I am converting an application from PHP to JSP
in PHP I am able to explode a strings parts into an array.
For example
my string = "1.21.32.45.232";
I want jsp to return an array containing the parts of this string separated by dots into an array.
Any help appreciated.
Thank You
Colin

Thanks everyone for your help,
I knocked this up but don't get any output?
Any help appreciated.
Thank You
Colin
<html>
<head>
</head>
<%@ page language="java" import="java.util.StringTokenizer" %>
<body>
<%
StringTokenizer st = new StringTokenizer("123.21.56.23", ".");
while ( st.hasMoreTokens() ){
System.out.println( st.nextToken() );
%>
</body>
</html>

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