Java how to remove duplicate elements in char array

/**
 * @author lautturi.com
 * Java example: 
 */

import java.util.*;

public class Lautturi {

	public static void main(String[] args) {

		char[] array = {'l','a','u','t','t','u','r','i','j','a','v','a'};
		String _array = "";
	    for(int i = 0; i < array.length; i++) {
	        if(_array.indexOf(array[i]) == -1) 
	            _array = _array+array[i];      
	    }
	    char[] newArray = _array.toCharArray();

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

output:

[l, a, u, t, r, i, j, v]