对象克隆实例

A.java

package second;

public class B {
    public static void main(String[] args){
        C c = new C();
        c.i = 200;
        c.haha();
        System.out.println("==========");
        C cl = (C)c.clone();
        cl.i = 500;
        cl.haha();
        c.haha();
    }
}

B.java

package second;

class C implements Cloneable{ //实现克隆接口
    public int i = 100;
    void haha() {
        System.out.println(i);
    }
    public Object clone(){
        C handler = null;
        try{
            handler = (C)super.clone();
        }catch(CloneNotSupportedException e){
            e.printStackTrace();
        }
        return handler;
    }
}

结果：

200
==========
500
200