java Arrays.copyOf shallow copy

package com.robert.copy;

import java.util.Arrays;

public class TestBalloon {

public staticvoid main(String[] args) {

intballonNum = 7;

Balloon[] box1 = new Balloon[ballonNum];

for(inti = 0; i < ballonNum ;i ++) {

box1[i] =new Balloon(Color.values()[i], i);

}

// Balloon[] box2 = Arrays.copyOf(box1,  box1.length);    shallow copy 

Balloon[] box2 = new Balloon[box1.length];

for(inti = 0; i< box1.length;i++) {

box2[i] =new Balloon(box1[i].getColor(),box1[i].getId());

}

box2[6].setColor(Color.Blue);

for(Balloon b: box1) {

System.out.println(b);

}

}

}

enum Color {

Red,Orange,Yellow,Green,Indigo,Blue,Violet;

}

class Balloon {

private intid;

private Color color;

public int getId() {

returnid;

}

public void setId(intid) {

this.id =id;

}

public Color getColor() {

returncolor;

}

public void setColor(Colorcolor) {

this.color =color;

}

public Balloon(Color _color, int _id) {

color = _color;

id = _id;

}

@Override

public String toString() {

return"Balloon [id=" + id +", color=" + color +"]";

}

}