1.过程相同，但是结果不同
2.数据内容完全相同，但是实例不同
克隆就是原型模式的一种使用场景。
代码：
孙悟空的金箍棒
1）
package com.gupaoedu.vip.prototype.greatestsage;
import java.util.Date;
//猴子
public class Monkey {
//身高
protected int height;//基本
//体重
protected int weight;
//生日
protected Date birthday;//不是基本类型
public int getHeight() {
return height;
}
public void setHeight(int height) {
this.height = height;
}
public int getWeight() {
return weight;
}
public void setWeight(int weight) {
this.weight = weight;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
}
2）
package com.gupaoedu.vip.prototype.greatestsage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Date;
/**
* 齐天大圣
* @author Tom
*
*/
public class TheGreatestSage extends Monkey implements Cloneable,Serializable{
//金箍棒
private GoldRingedStaff staff;
//从石头缝里蹦出来
public TheGreatestSage(){
this.staff = new GoldRingedStaff();
this.birthday = new Date();
this.height = 150;
this.weight = 30;
System.out.println("------------------------");
}
//分身技能
public Object clone(){
//深度克隆
ByteArrayOutputStream bos = null;
ObjectOutputStream oos = null;
ByteArrayInputStream bis = null;
ObjectInputStream ois = null;
try {
//return super.clone();//默认浅克隆，只克隆八大基本数据类型和String
//序列化
bos = new ByteArrayOutputStream();
oos = new ObjectOutputStream(bos);
oos.writeObject(this);
//反序列化
bis = new ByteArrayInputStream(bos.toByteArray());
ois = new ObjectInputStream(bis);
TheGreatestSage copy = (TheGreatestSage)ois.readObject();
copy.birthday = new Date();
return copy;
} catch (Exception e) {
e.printStackTrace();
return null;
}finally{
try {
bos.close();
oos.close();
bis.close();
ois.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
//变化
public void change(){
TheGreatestSage copySage = (TheGreatestSage)clone();
System.out.println("大圣本尊生日是：" + this.getBirthday().getTime());
System.out.println("克隆大圣的生日是:" + copySage.getBirthday().getTime());
System.out.println("大圣本尊和克隆大圣是否为同一个对象:" + (this == copySage));
System.out.println("大圣本尊持有的金箍棒跟克隆大圣持有金箍棒是否为同一个对象:" + (this.getStaff() == copySage.getStaff()));
}
public GoldRingedStaff getStaff() {
return staff;
}
public void setStaff(GoldRingedStaff staff) {
this.staff = staff;
}
}
3）
package com.gupaoedu.vip.prototype.greatestsage;
import java.io.Serializable;
/**
* 金箍棒
* @author Tom
*
*/
public class GoldRingedStaff implements Serializable{
private float height = 100; //长度
private float diameter = 10;//直径
/**
* 金箍棒长大
*/
public void grow(){
this.diameter *= 2;
this.height *= 2;
}
/**
* 金箍棒缩小
*/
public void shrink(){
this.diameter /= 2;
this.height /= 2;
}
}
4）
package com.gupaoedu.vip.prototype.greatestsage;
public class TestPrototype {
public static void main(String[] args) {
TheGreatestSage sage = new TheGreatestSage();
sage.change();
//跟《西游记》中描述的一致，怎么办？
}
}
