遇到 EOFException 怎么解决？java报错

遇到 EOFException 怎么解决？java报错

在编写java的样例代码时出现这种问题。这种情况应该如何解决和避免那？

public class ObjectStream {
  public static void main(String[] args) throws Exception {
    User user1=new User("yiwangzhibujian",27);
    User user2=new User("laizhezhikezhui",24);
    
    ByteArrayOutputStream bos=new ByteArrayOutputStream();
    ObjectOutputStream oos=new ObjectOutputStream(bos);
    
    oos.writeObject(user1);
    oos.writeObject(user2);
    oos.writeObject(null);
    
    byte[] data = bos.toByteArray();
    ByteArrayInputStream bis=new ByteArrayInputStream(data);
    ObjectInputStream ois=new ObjectInputStream(bis);
    
    System.out.println(ois.readObject());
    System.out.println(ois.readObject());
    System.out.println(ois.readObject());
    System.out.println(ois.readObject());
  }
}
class User implements Serializable{
  private static final long serialVersionUID = 1L;
  public String name;
  public int age;
  public User(String name, int age) {
    this.name = name;
    this.age = age;
  }
  @Override
  public String toString() {
    return "User [name=" + name + ", age=" + age + "]";
  }
}

错误信息:

Exception in thread "main" java.io.EOFException
    at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2608)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1319)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
    at yiwangzhibujian.objectstream.ObjectStream.main(ObjectStream.java:28)

原因是什么，为什么会发生异常，以及下面到底发生了什么。如果有人能帮忙？提前谢谢