Java split string by multiple conditions

/**
 * @author lautturi.com 
 * Java example: split string with 4 condition s in java
 */

import java.util.*;

public class Lautturi {
	public static void main(String[] args) {
		String str = "hi, lau: welcome to lauttur! java world!";
		String[] words = str.split("[:,! ]");

		System.out.println(Arrays.toString(words));
	}
}

output:

[hi, , lau, , welcome, to, lauttur, , java, world]