Java 反序列化ArrayList。没有有效的构造函数

这就是我如何反序列化包含标识对象的arrayList

public void deserializeArrayList(){
    String path = "./qbank/IdentificationHARD.quiz";
    try{
          FileInputStream fileIn = new FileInputStream(path);
            ObjectInputStream in = new ObjectInputStream(fileIn);
            ArrayList<Identification> list = (ArrayList<Identification>) in.readObject();
            System.out.println(list);
    }catch(Exception e){
        e.printStackTrace();
    }
}

这是92号线

ArrayList<Identification> list = (ArrayList<Identification>) in.readObject();

问题是java中的-->

Java serialization process  only continues in object hierarchy till the class
is Serializable i.e. implements Serializable interface in Java.

在您的类中，您正在调用不可序列化的

super

类构造函数

这就是问题所在：）

关于第二个问题，请看一看

---

你的

标识

对象呢？你能把你的标识代码放进去吗class@SumitSingh我更新了它，请选中为

标识创建默认构造函数。为什么要添加默认构造函数？我还需要空构造函数吗？连载？你在哪里找到的？“Java序列化过程仅在对象层次结构中继续，直到类可序列化，即在Java中实现可序列化接口。”？
ArrayList<Identification> list = (ArrayList<Identification>) in.readObject();

 package quizmaker.management; 
 import java.io.Serializable;
 import quizmaker.Accounts.Rights.IAnswerable;

public class Identification extends Question implements Serializable{

    private static final long serialVersionUID = 2L;
    private String question;
    private String answer;

    public Identification(String q , String a){
        super(q,a);
    }

    public String toString(){
        return String.format("Question: %s\n Answer %s", getQuestion(),getAnswer());
    }
}

Java serialization process  only continues in object hierarchy till the class
is Serializable i.e. implements Serializable interface in Java.

During deserialization, the fields of non-serializable classes will be 
initialized using the public or protected no-arg constructor of the class.
A no-arg constructor must be accessible to the subclass that is serializable.
The fields of serializable subclasses will be restored from the stream.