remove duplicates from string in java

/**
 * @author lautturi.com 
 * Java example: remove duplicates from string in java
 */


import java.util.*;
import java.util.regex.Pattern;

public class Lautturi {

	public static void main(String[] args) {
		String str = "lauuttturiiii jaavaava python perl!";

		StringBuffer sb=new StringBuffer(str);
		for (int i=0;i<sb.length()-1;i++){
		    for (int j=i+1;j<sb.length();j++){
		        if (sb.charAt(i)==sb.charAt(j))
		            sb.deleteCharAt(j);
		    }
		}
		String newString = sb.toString();
		System.out.println(newString);
	}
}

output:

lauttrii javpyhone!