Program: How to split a string using regular expression?

We can split a string using regular expression pattern. Example shows how to split the string.

package com.java2novice.regex;

import java.util.regex.Pattern;

public class MyTokens {

	public static void main(String a[]){
		
		String str = "I have a cat. I play cricket with bat. I dont like rat,"+
			"i hate mats, now break it";
		Pattern ptn = Pattern.compile("(cat|rat|mat|bat)");
		String[] parts = ptn.split(str);
		for(String p:parts){
			System.out.println(p);
		}
	}
}

I have a 
. I play cricket with 
. I dont like 
,i hate 
s, now break it