import java.util.ArrayList;

import java.io.*;

public class Prototype implements Cloneable{

private ArrayList<Integer> list=new ArrayList<Integer>();

public Prototype clone(){

Prototype prototype=null;

try{

prototype=(Prototype)super.clone(); //Object中clone()方法，浅拷贝

prototype.list = (ArrayList) this.list.clone(); //实现ArrayList的深拷贝

}catch(CloneNotSupportedException e){

e.printStackTrace();

}

return prototype;

}

public void showList(){

for(int i=0;i<list.size();i++)

System.out.println("list["+i+"] is "+list.get(i));

}

public void addList(int elem){

list.add(elem);

}

public void doSomething(){

System.out.println("This is a Prototype.");

}

}

/*

//通过序列化二进制流实现拷贝(深拷贝)，Object类的clone()方法通过本地方法复制内存中对象

public class Prototype implements Cloneable, Serializable{

//必须实现Serializable接口，否则writeObject抛异常

private ArrayList list=new ArrayList();

public Prototype clone(){

Prototype prototype=null;

try{

//写入当前对象的二进制流

ByteArrayOutputStream bos = new ByteArrayOutputStream();

ObjectOutputStream oos = new ObjectOutputStream(bos);

oos.writeObject(this);

// 读出二进制流产生的新对象

ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());

ObjectInputStream ois = new ObjectInputStream(bis);

prototype=(Prototype)ois.readObject();

}catch(IOException | ClassNotFoundException e){

e.printStackTrace();

}

return prototype;

}

public void showList(){

for(int i=0;i<list.size();i++)

System.out.println("list["+i+"] is "+list.get(i));

}

public void addList(int elem){

list.add(elem);

}

public void doSomething(){

System.out.println("This is a Prototype.");

}

} */