java split string to substring with 2 characters

/**
 * @author lautturi.com 
 * Java example: split string to substring with 2 characters in java
 */

import java.util.*;

public class Lautturi {
	public static void main(String[] args) {
		String str = "hello lautturi java world!";

        String[] array=str.split("(?<=\G.{2})");

        System.out.println(java.util.Arrays.toString(array));     
	}
}

output:

[he, ll, o , la, ut, tu, ri,  j, av, a , wo, rl, d!]