——Cloneable接口和clone方法
——Prototype模式实现起来最困难的地方是实现内存的复制和操作，Java中提供了clone方法省了大部分事情
package com.littlepage.PrototypePattern; public class Sheep implements Cloneable{ String name; int date; public Sheep(String name, int date) { super(); this.name = name; this.date = date; } @Override protected Object clone() throws CloneNotSupportedException { Object obj=super.clone(); return obj; } }
1.继承Cloneable接口
2.重写clone方法
测试，不同只羊，相同属性
package com.littlepage.PrototypePattern; public class Test { public static void main(String[] args) throws CloneNotSupportedException { Sheep s=new Sheep("molly",2019); Sheep ss=(Sheep)s.clone(); System.out.println(s); System.out.println(ss); } }
浅拷贝，只拷贝一层，不会把对象中引用的对象进行拷贝
深拷贝，拷贝深层
初学java的时候应该学过，这里不提太多
package com.littlepage.PrototypePattern; import java.util.Date; public class Sheep implements Cloneable{ String name; Date date; public Sheep(String name, Date date) { super(); this.name = name; this.date = date; } @Override protected Object clone() throws CloneNotSupportedException { Object obj=super.clone(); Sheep s=(Sheep)obj; s.date=(Date)this.date.clone(); return obj; } }
原文：https://www.cnblogs.com/littlepage/p/10068854.html