Finding Duplicate

/*************************************************************************
 *  Compilation:  javac FindDuplicate.java
 *  Execution:    java FindDuplicate
 *
 *  @author: Karen Li
 *
 * FindDuplicate that reads n integer arguments from the command line 
 * into an integer array of length n, where each value is between is 1 and n, 
 * and displays true if there are any duplicate values, false otherwise.
 *
 *  % java FindDuplicate 10 8 5 4 1 3 6 7 9
 *  false
 *
 *  % java FindDuplicate 4 5 2 1 2
 *  true
 *************************************************************************/

public class FindDuplicate {
    public static void main(String[] args){
		int n = args.length;
		int arr[] = new int[n];
		for (int i = 0; i < n; i++){
			arr[i] = Integer.parseInt(args[i]);
		}
		boolean x = false;
		for (int i = 0; i < n; i++){
			for (int j = i + 1; j < n; j++){
				if ((arr[i] == arr[j]) && (i != j)){
					x = true;
					break;
				}
			}
		}
		if (x){
			System.out.println("true");
		} else {
			System.out.println("false");
		}
	}
}