ArraysInPlace.java

import java.util.*;

public class ArraysInPlace {

    public static void main(String[] args) {

        int x = 5;
        System.out.println(x);
        proofThatWeCopy(x);
        System.out.println(x);

        int[] y = new int[3];
        y[0] = 100;
        y[1] = 200;
        y[2] = 300;
        System.out.println(Arrays.toString(y));
        noWeDont(y);
        System.out.println(Arrays.toString(y));


    }

    public static void proofThatWeCopy(int x) {
        x = 100;
    }

    public static void noWeDont(int[] y) {
        y[0] = 77777;
        y[1] = 88888;
        y[2] = 99999;
    }

}