imooc.txt是空的

package com.imooc.buf;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

public class Seria {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Product iphone= new Product(123,"iphone","telephone",4888);
		Product ipad = new Product(234,"ipad","computer",5088);
		Product macbook = new Product(345,"macbook","computer",10688); 
		Product o;
		try {
			FileOutputStream fos = new FileOutputStream("imooc.txt");
			ObjectOutputStream oos = new ObjectOutputStream(fos);
			oos.writeObject(iphone);
			oos.writeObject(ipad);
			oos.writeObject(macbook);
			oos.flush();

			FileInputStream fis = new FileInputStream("imooc.txt");
			ObjectInputStream ois = new ObjectInputStream(fis);
			for(int i=0;i<3;i++) {
				System.out.println((Product)ois.readObject());
			}

			fos.close();
			oos.close();
			fis.close();
			ois.close();

		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}

我用flush()了，为什么imooc.txt是空的？

​同学你好，测试同学代码是可以正确写入与读取数据的，如下所示：

    ​同学可以右击文件选择Properties ，找到文件所在的目录中，然后使用记事本或其他编译器打开文件，查看是否存在数据。如下所示：

祝学习愉快！