package btp.oneP;

import java.io.Externalizable;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.ObjectInput;

import java.io.ObjectInputStream;

import java.io.ObjectOutput;

import java.io.ObjectOutputStream;

public class Blips {

public static void main(String[] args) throws FileNotFoundException, IOException, ClassNotFoundException {

Blip1 b1 = new Blip1();

Blip2 b2 = new Blip2(9);

ObjectOutputStream o = new ObjectOutputStream(new FileOutputStream("C:\\Users\\dell\\Desktop\\IO\\Blips.out"));

o.writeObject(b1);

o.writeObject(b2);

o.close();

ObjectInputStream in = new ObjectInputStream(new FileInputStream("C:\\Users\\dell\\Desktop\\IO\\Blips.out"));

b1 = (Blip1) in.readObject();

b2 = (Blip2) in.readObject();

}

}

class Blip1 implements Externalizable{

public Blip1(){

System.out.println("Blip1 Constructor");

}

@Override

public void writeExternal(ObjectOutput out) throws IOException {

System.out.println("Blip1.writeExternal");

}

@Override

public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {

System.out.println("Blip1.readExternal");

}

}

//实现Externalizable接口的类必须要提供public的无参数的构造器，不然会报错。Serializable则不需要

class Blip2 implements Externalizable{

public Blip2(int i){

System.out.println("Blip2 Constructor");

}

@Override

public void writeExternal(ObjectOutput out) throws IOException {

System.out.println("Blip2.writeExternal");

}

@Override

public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {

System.out.println("Blip2.readExternal");

}

}