prototype

package prototype;

public class GirlFriend implements Cloneable
{
private String name;
private int age;

public void setAge(int age) {
this.age = age;
}

public void setName(String name)
{
this.name = name;
}

public String toString()
{
return name+"  年龄是： "+age;
}

public GirlFriend clone() throws CloneNotSupportedException
{
return (GirlFriend) super.clone();
}
}



package prototype;

public class Boy implements Cloneable
{
private String name;
private GirlFriend gf ;

public void setName(String name)
{
this.name = name;
}
public GirlFriend getGF()
{
return gf;
}
public Boy(String name)
{
this.name = name;
gf = new GirlFriend();
gf.setAge(18);
gf.setName("小芳");
}
public String toString()
{
return name+"  的女朋友是："+gf;
}
public Boy clone() throws CloneNotSupportedException
{
Boy boy = (Boy)super.clone();
boy.gf = gf.clone();
return boy;
}
}


package prototype;

public class Test
{
public static void main(String[] args) throws CloneNotSupportedException
{
Boy boy = new Boy("张三");
System.out.println(boy+"  "+boy.hashCode());

Boy b = boy.clone();
b.getGF().setAge(20);
System.out.println(b+"  "+b.hashCode());
System.out.println(boy+"  "+boy.hashCode());
}

}
/*
* 原型模式主要是clone 深克隆和浅克隆，深克隆就是要将应用的对象也拷贝进来
* 他们的引用对象不同。而浅克隆只拷贝引用，也就是说他们引用的对象还是同一个。
* 深拷贝中，类中就必须将引用的对象拷贝一份，可以在clone方法中拷贝 也可以用
* 一个私有的构造方法拷贝，但是必须在clone方法中给他赋值。
*/