Java中的clone

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图书馆类

1、被克隆的类需要实现Cloneable接口，重写Object的clone方法。

    public class TuShuGuan implements Cloneable{  
    private String shuming;  
    private String time;  
    public TuShuGuan(String shuming, String time) {  
        super();  
        this.shuming = shuming;  
        this.time = time;  
    }  
    public void setShuming(String shuming) {  
        this.shuming = shuming;  
    }  
    public void setTime(String time) {  
        this.time = time;  
    }  
    public String getShuming() {  
        return shuming;  
    }  
    public String getTime() {  
        return time;  
    }  
    public Object clone() throws CloneNotSupportedException {    
        return super.clone();    
    }    
}  

主函数

主函数需要抛CloneNotSupportedException异常

    /** 
 * Java中的clone 
 * @author Administrator 
 * 
 */  
public class CloneTest {  
    public static void main(String[] args)throws CloneNotSupportedException{  
        TuShuGuan t = new TuShuGuan("java","2017年");  
        System.out.println(t.getShuming()+"---"+t.getTime());  
        Object obj = t.clone();  
        TuShuGuan t2 = (TuShuGuan)obj;  
        System.out.println(t2.getShuming()+"---"+t2.getTime());  
        TuShuGuan t3 = t;  
        t3.setShuming("C++");  
        t3.setTime("2018年");  
        System.out.println(t3.getShuming()+"---"+t3.getTime());  
        System.out.println(t2.getShuming()+"---"+t2.getTime());  
    }  
}