Java invalidClassException:请帮助获取这些错误

我在运行程序时遇到以下错误：

java.io.InvalidClassException: Food; local class incompatible: stream classdesc serialVersionUID = -1986042743597353721, local class serialVersionUID = -2452322360924937818
    at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:570)
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1599)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1494)
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1599)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1494)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1748)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1327)
    at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1683)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1321)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:349)
    at GroceryStore.readInventory(GroceryStore.java:16)
    at GroceryStore.main(GroceryStore.java:39)

我尝试了很多东西，但不确定哪里出了问题，我对这件事还不熟悉

    import java.io.Serializable;

    public abstract class Food implements Serializable {
    String Type, Name;
    double Price;
    private static final long serialVersionUID = -2452322360924937818L;

    public Food(String Type, String Name, double Price){
            this.Type = Type;
        this.Name = Name;
        this.Price = Price;
    }
    public String getType(){
        return Type;
    }
    public String getName(){
        return Name;
    }
    public double getPrice(){
        return Price;
    }
    public String toString(){
        return (Type + " " + Name + " " + Price);
    }
    public abstract double getQuantity();
}



    import java.io.Serializable;

    public class FoodItem extends Food implements Serializable {

     private static final long serialVersionUID = -2452322360924937818L;
     private double quantity;
     int bestBeforeMonth;
     int bestBeforeDay;


     public FoodItem(String Type, String Name, double Price, double quantity, int        bestBeforeMonth, int bestBeforeDay) {
        super(Type, Name, Price);
        this.quantity = quantity;
        this.bestBeforeDay = bestBeforeDay;
        this.bestBeforeMonth = bestBeforeMonth;
     }


     @Override
     public double getQuantity() {
        return quantity;
     }
     public void removeQuantity(double quantity){
        this.quantity = this.quantity - quantity;
     }

    }


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


    public class GroceryStore {
     static FoodItem[] inventory = null; 
     public static void readInventory(){

    try {
        ObjectInputStream in = new ObjectInputStream(new FileInputStream("grocery.bin"));
        inventory[0] =  (FoodItem) in.readObject();



    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }
     }

public static void main(String[] args){
    readInventory();
}
}

---

此消息是由于类的序列化版本与当前类之间的版本不匹配而发出的

消息表示您用对象流序列化的类的版本id为

-1986042743597353721

，但您的类版本id为

-2452322360924937818L

因此，您有两种选择：

• 获取序列版本id为-1986042743597353721的类，或
• 编写一个理解旧格式和 可以构造一个新对象

是完整的文档

您的文件“screery.bin”中可能填充了从serialVersionUID=-1986042743597353721的Food.class创建的Food对象，您正试图将其强制转换为serialVersionUID=-2452322360924937818的Food.class

首先，我将尝试将实现的类的SerialVersionId更改为-1986042743597353721

---

如果出现其他相关异常，则与序列化对象和类存在实际差异。在本例中，您应该找出是谁或是什么创建了grofferry.bin，并克隆了它的Food.java类。

假设我想使用-1986042743597353721类，我该怎么做呢？我应该在哪里更改它？在食品课上？还是美食类？这就是如何实现私有静态final long serialVersionUID=-1986042743597353721L；食物类，抽象类。是的，这就是解决问题的方法。我试过了，现在出现了这个错误。java.io.InvalidClassException:FoodItem；本地类不兼容：stream classdesc serialVersionUID=-2452322360924937818，本地类serialVersionUID=1140335404112415784您的FoodItem类具有哪个serialVersionUID？根据错误，它应该是-2452322360924937818L