java find duplicate elements in array

/**
 * @author lautturi.com
 * Java example: how to find duplicates in array using java
 */
import java.util.*;

public class Lautturi {

	public static void main(String[] args) {
		int[] numArray = { 11,4,12,7,55,8,12,8,13,55,12,7 };
	    for(int i = 0; i < numArray.length; i++){
	      for(int j = i + 1; j < numArray.length; j++){
	        if(numArray[i] == numArray[j]){
	          System.out.println("Duplicate element found " + numArray[j]);
	        }
	      }
	    }
		
	}
}

output:

Duplicate element found 12
Duplicate element found 12
Duplicate element found 7
Duplicate element found 55
Duplicate element found 8
Duplicate element found 12