java - 程序未执行-编译警告-6ren

java - 程序未执行-编译警告

转载作者：行者123 更新时间：2023-12-02 06:58:16

我是一名新的java程序员。我试图在 Eclipse 中执行这个程序，但错误是

The serializable class LoveJava does not declare a static final serialVersionUID field of type long.

<小时/>

private static final long serialVersionUID = 1L;

为什么我必须声明这一行？

import acm.graphics.*;
import acm.program.*;

public class LoveJava extends GraphicsProgram {

    private static final long serialVersionUID = 1L;

    public void run(){
        add(new GLabel("I love Java"),100,75);
    }
}

最佳答案

欢迎来到java社区。

阅读specific API在问这里之前，这里是 API 的重要部分。

The serialization runtime associates with each serializable class a version number, called a serialVersionUID, which is used during deserialization to verify that the sender and receiver of a serialized object have loaded classes for that object that are compatible with respect to serialization. If the receiver has loaded a class for the object that has a different serialVersionUID than that of the corresponding sender's class, then deserialization will result in an InvalidClassException. A serializable class can declare its own serialVersionUID explicitly by declaring a field named "serialVersionUID" that must be static, final, and of type long:

关于java - 程序未执行-编译警告，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17024248/