Helping out friend

import java.util.Arrays;
public class ProgramForFriend {

    public static void main(String[] args) {
        int[] in = {1,3,5,4,7,9,1,3};
        int[] out = new int[in.length];


        //Cycling through array
        for (int i = 0; i < in.length; i++) {
            System.out.println("In "+ i + ": " + in[i]);
            if (Arrays.asList(out).contains(in[i])) {

                out[i] = 0;


            } else {

                out[i] = in[i];

            }

        }

        //Printing out in array
        System.out.println("In:");
        for (int i=0; i<in.length; i++)
        {
            System.out.print(in[i]+", ");
        }
        //Adding space
        System.out.println();

        //Printing out out array
        System.out.println("Out:");
        for (int i=0; i<out.length; i++)
        {
            System.out.print(in[i]+", ");
        }


    }

}