eclipse中的serialVersionUID字段警告 [英] serialVersionUID field warning in eclipse

问题描述

我刚刚开始使用AWT并在其中制作了一个简单的程序，它工作正常，但它在eclipse中显示一条我不明白的警告信息：

可序列化类TestGUI没有声明类型为long的静态最终
serialVersionUID字段

I知道警告信息与AWT无关，并且没有必要发布我的整个代码，但当我试图制作代码的SSCCE时，警告也消失了。由于我不知道为什么会产生这个警告，所以我不知道在我的SSCCE中保留哪一部分。因此整个代码！

我的代码是：

  import java .awt.Frame; 
 import java.awt.Graphics; 
 import java.awt.event.MouseAdapter; 
 import java.awt.event.MouseEvent; 
 import java.awt.event.WindowAdapter; 
 import java.awt.event.WindowEvent; 
 
公共类TestGUI扩展Frame {
 / ** 
 * @param args 
 * / 
 private int x = 50; 
 private int y = 50; 
 
 TestGUI（String s）{
 addWindowListener（new WindowAdapter（）{
 public void windowClosing（WindowEvent we）{
 setVisible（false）; 
 System.exit（0）; 
} 
}）; 
 addMouseListener（new MouseAdapter（）{
 public void mouseClicked（MouseEvent me）{
x = me.getX（）; 
y = me.getY（）; 
 repaint （）; 
} 
}）; 
} 
 
 public void paint（Graphics g）{
 g.drawString（Hello Princess，100,100）; 
 g.drawString（鼠标点击这里，x，y）; 
} 
 
 public static void main（String [] args）{
 // TODO自动生成的方法stub 
 TestGUI tg = new TestGUI（first） ; 
 tg.setSize（500,500）; 
 tg.setVisible（true）; 
} 
 
} 
  

提前完成Thanx！

解决方案

Eclipse曾经默认禁用该警告。在Eclipse Indigo（3.7）中，默认设置是启用警告。您可以在2个位置更改设置，一个用于工作区中的所有内容，一个用于单个项目。

要禁用中所有项目的警告工作区，转到Window / Preferences并打开Java / Compiler /Errors / Warnings选项卡，打开潜在的编程问题，然后将Serializable class without serialVersionUID的值更改为Ignore（或任何你认为是合适的。）

要禁用单个项目的警告，您可以右键单击项目，选择属性，然后转到到Java Compiler /Errors / Warnings，单击Enable project specific settings（如有必要），然后选择Potential programming problems并将Serializable class without serialVersionUID的值更改为Ignore（或您认为合适的任何内容）。 / p>

I have just started on AWT and made a simple program in it, it works fine but it shows a warning message in eclipse which i don't understand:

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

I know that the warning message is not related to AWT and there was no need to post my whole code but when i tried to make a SSCCE of the code the warning also disappeared. Since I don't know why this warning is generated i didn't knew which part to retain in my SSCCE. Hence the whole code!

My code is:

import java.awt.Frame;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestGUI extends Frame {
    /**
     * @param args
     */
    private int x = 50;
    private int y = 50;

    TestGUI(String s) {
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent we) {
                setVisible(false);
                System.exit(0);
            }
        });
        addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent me) {
                x = me.getX();
                y = me.getY();
                repaint();
            }
        });
    }

    public void paint(Graphics g) {
        g.drawString("Hello Princess", 100, 100);
        g.drawString("Mouse clicked here", x, y);
    }

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        TestGUI tg = new TestGUI("first");
        tg.setSize(500, 500);
        tg.setVisible(true);
    }

}

Thanx in advance!

解决方案

Eclipse used to have that warning disabled by default. In Eclipse Indigo (3.7), the default was to enable the warning. You can change the setting in 2 places, one for everything in the workspace, and one for a single project.

To disable the warning for all projects in the workspace, go to Window / Preferences and open the Java / Compiler / "Errors/Warnings" tab, and open "Potential programming problems", then change the value of "Serializable class without serialVersionUID" to Ignore (or whatever you think is appropriate).

To disable the warning for a single project, you can right-click on the project, select Properties, then go to Java Compiler / "Errors/Warnings", click Enable project specific settings (if necessary), then select "Potential programming problems" and change the value of "Serializable class without serialVersionUID" to Ignore (or whatever you think is appropriate).

这篇关于eclipse中的serialVersionUID字段警告的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！