java 原型模式之浅拷贝

import java.util.ArrayList;
import java.util.List;


public class Thing implements Cloneable{
    
    String s = null;
    Integer i = null;
    
    private List<String> list = new ArrayList<String>();
    
    public Thing(String s,int i) {
        System.out.println("init");
        this.s = s;
        this.i = i;
    }
    
    public void setS(String s) {
        this.s = s;
    }

    public void println() {
        System.out.println( this.s + "\t" + this.i + "\t" + this.list.toString());
    }
    
    public void setI(Integer i) {
        this.i = i;
    }
    
    public void setValue(String value) {
        this.list.add(value);
    }
    
    public Thing clone() {
        try {
            return (Thing) super.clone();
        } catch (CloneNotSupportedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }
    
    public static void main(String[] args) {
        Thing t = new Thing("one",7);
        t.setValue("list1");
        
        Thing clone = (Thing) t.clone();
        t.setS("SECOND");
        t.setI(10);
        t.setValue("list2");
        System.out.print("t:");
        t.println();
        System.out.print("clone:");
        clone.println();
    }
}

init
t:SECOND    10    [list1, list2]
clone:one    7    [list1, list2]