原型克隆模式

最新推荐文章于 2025-01-14 15:32:25 发布

糖醋花生

最新推荐文章于 2025-01-14 15:32:25 发布

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分类专栏：设计模式

本文链接：https://blog.youkuaiyun.com/qq_28689929/article/details/78774322

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本文通过两个具体的Java类实例，详细解析了对象浅复制与深复制的区别。浅复制仅复制对象本身，而深复制则会递归复制对象及其内部的所有引用对象。

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//浅复制

public class Sheep implements Cloneable,Serializable {

private String sname;

private Date birthday;

public Sheep() {}

public Sheep(String sname, Date birthday) {
super();
this.sname = sname;
this.birthday = birthday;
}

@Override
protected Object clone() throws CloneNotSupportedException {
Object obj = super.clone(); //直接调用object对象的clone()方法！
return obj;
}

public String getSname() {
return sname;
}
public void setSname(String sname) {
this.sname = sname;
}

public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}

}

//深复制
public class Sheep2 implements Cloneable {
private String sname;
private Date birthday;

public Sheep2() {
}

public Sheep2(String sname, Date birthday) {
super();
this.sname = sname;
this.birthday = birthday;
}

@Override
protected Object clone() throws CloneNotSupportedException {
Object obj = super.clone(); //直接调用object对象的clone()方法！

//添加如下代码实现深复制(deep Clone)
Sheep2 s = (Sheep2) obj;
s.birthday = (Date) this.birthday.clone(); //把属性也进行克隆！

return obj;
}

public String getSname() {
return sname;
}
public void setSname(String sname) {
this.sname = sname;
}

public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
}