0409

import java.io.*;
public class WriteTeacher
{
	public static void main(String[] args)
	{
		try(
			// 创建一个ObjectOutputStream输出流
			ObjectOutputStream oos = new ObjectOutputStream(
				new FileOutputStream("teacher.txt")))
		{
			Person per = new Person("孙悟空", 500);
			Teacher t1 = new Teacher("唐僧" , per);
			Teacher t2 = new Teacher("菩提祖师" , per);
			// 依次将四个对象写入输出流
			oos.writeObject(t1);
			oos.writeObject(t2);
			oos.writeObject(per);
			oos.writeObject(t2);
		}
		catch (IOException ex)
		{
			ex.printStackTrace();
		}
	}
}

import java.io.*;
public class ReadTeacher
{
	public static void main(String[] args)
	{
		try(
			// 创建一个ObjectInputStream输出流
			ObjectInputStream ois = new ObjectInputStream(
				new FileInputStream("teacher.txt")))
		{
			// 依次读取ObjectInputStream输入流中的四个对象
			Teacher t1 = (Teacher)ois.readObject();
			Teacher t2 = (Teacher)ois.readObject();
			Person p = (Person)ois.readObject();
			Teacher t3 = (Teacher)ois.readObject();
			// 输出true
			System.out.println("t1的student引用和p是否相同："
				+ (t1.getStudent() == p));
			// 输出true
			System.out.println("t2的student引用和p是否相同："
				+ (t2.getStudent() == p));
			// 输出true
			System.out.println("t2和t3是否是同一个对象："
				+ (t2 == t3));
		}
		catch (Exception ex)
		{
			ex.printStackTrace();
		}
	}
}