Java 保存文件错误

Question

抱歉，如果这是一个简单的问题，但我是 Java 编程新手，无法处理 Java 保存文件错误的问题。错误是，有时它会毫无错误地保存和加载值，有时它会发生错误。显示错误并且仍然加载。但有时保存文件不起作用。

我得到的错误:

java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(Unknown Source)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(Unknown Source)
at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
at java.io.ObjectInputStream.<init>(Unknown Source)
at Clicker.ClickerGame.LoadFile(ClickerGame.java:2479)
at Clicker.mainClass.main(mainClass.java:27)

我的主要(入门类(class)):

package Clicker;

import javax.swing.JFrame;

public class mainClass {

     public static void main(String[] args) {

            ClickerGame CG = new ClickerGame();

            JFrame frame = new JFrame("CarCollectionarV1");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            CG.addComponentToPane(frame.getContentPane());

            frame.pack();
            frame.setVisible(true);
            frame.setResizable(true);
            frame.setSize(1000, 700);

            CG.LoadFile();

            boolean GameLoop = true;
            while(GameLoop){
            CG.refresh();
            CG.SaveFile();
            }           

     }
}

ClickerGame 类(SaveFile 和 LoadFile 函数在哪里):

  public void SaveFile(){
        try{
            File SaveFile = new File("SaveFile.sav");
            if(!SaveFile.exists()) {
                SaveFile.createNewFile();
            } 
            FileOutputStream saveFileSub = new FileOutputStream(SaveFile);
            ObjectOutputStream save = new ObjectOutputStream(saveFileSub);

            save.writeObject(CarMain.main);
            save.writeObject(Box.boxes);
            save.writeObject(CarFrame.frames);
            save.writeObject(Part.parts);
            save.writeObject(CarsLv1.cars);
            save.writeObject(CarsLv2.cars);
            save.writeObject(CarsLv3.cars);
            save.writeObject(CarsLv4.cars);
            save.writeObject(CarsLv5.cars);
            save.writeObject(CarsLv6.cars);
            save.writeObject(CarsLv7.cars);
            save.writeObject(CarsLv8.cars);
            save.writeObject(CarsLv9.cars);
            save.writeObject(CarsLv10.cars);

            save.close();
            }
            catch(Exception exc){
            exc.printStackTrace();
            }
    }

    public void LoadFile(){
    try{
        File SaveFile = new File("SaveFile.sav");
        if(!SaveFile.exists()) {
            SaveFile.createNewFile();
        } 
        FileInputStream SaveFileSub = new FileInputStream(SaveFile);
        ObjectInputStream load = new ObjectInputStream(SaveFileSub);

        CarMain.main = (Integer[]) load.readObject();
        Box.boxes = (Integer[]) load.readObject();
        CarFrame.frames = (Integer[]) load.readObject();
        Part.parts = (Integer[]) load.readObject();
        CarsLv1.cars = (String[]) load.readObject();
        CarsLv2.cars = (String[]) load.readObject();
        CarsLv3.cars = (String[]) load.readObject();
        CarsLv4.cars = (String[]) load.readObject();
        CarsLv5.cars = (String[]) load.readObject();
        CarsLv6.cars = (String[]) load.readObject();
        CarsLv7.cars = (String[]) load.readObject();
        CarsLv8.cars = (String[]) load.readObject();
        CarsLv9.cars = (String[]) load.readObject();
        CarsLv10.cars = (String[]) load.readObject();

        load.close();
        }
        catch(Exception exc){
        exc.printStackTrace();
        }
        }

Answer 1

您的 loadFile 方法读取的内容超出了文件内容。这就是 EOFException(文件结束异常)。

在您的 IDE 中，您可以看到行号，您将能够准确地知道您在哪一点读过:它是 ClickerGame 类中的第 2479 行(请参阅错误的堆栈跟踪)

如果我猜测，您将在保存文件之前加载该文件:因为您的加载文件会创建该文件(如果该文件不存在)，那么您将创建一个空文件，然后您尝试读取该文件的内容。