使用 jWindow 作为启动画面，显示效果很好，但图像无法绘制……只是打开了空白的 jWindow……有什么想法吗？

Question

1. jWindow opened for 2 seconds but image doesn't paint... any thoughts?
2. image file is in the same folder as class file...

public class CreateSplashScreen extends JWindow {
    JWindow jw = new JWindow();
    Image scImage = Toolkit.getDefaultToolkit().getImage("testImage.png");
    ImageIcon imageIcon = new ImageIcon(scImage);
    public CreateSplashScreen() {
        try {
            jw.setSize(700, 500);
            jw.setLocationRelativeTo(null);
            jw.setVisible(true);
        } catch (Exception e) {
        }
    }

    public void paint(Graphics g) {
       super.paint(g);
       g.drawImage(scImage, 0, 0, jw);
    }

    public void CloseSplashScreen() {
        jw.setVisible(false);
    }
    
    public static void main(String[] args) {
        CreateSplashScreen sp = new CreateSplashScreen();
        try {
            Thread.sleep(2000);
        } catch (InterruptedException ex) {
            Logger.getLogger(CreateSplashScreen.class.getName()).log(Level.SEVERE, null, ex);
        }
        sp.CloseSplashScreen();
    }
    
}

1. jWindow opened for 2 seconds but image doesn't paint... any thoughts?
2. image file is in the same folder as class file...

Answer 1

Why are you creating an internal JWindow when your class CreateSplashScreen already extends JWindow ? There is no need of it. You are messing with your program.

How? You are actually viewing the inner JWindow by jw.setVisible(true); but you are painting the image in the CreateSplashScreen 's `JWindow.

Try this code:

public class CreateSplashScreen extends JWindow 
{
    ImageIcon i = new ImageIcon(getClass().getResource("/createsplashscreen/testImage.png"));
    
    public CreateSplashScreen() {
     setSize(700, 500);
     setLocationRelativeTo(null);
     setVisible(true);
    }

    @Override
    public void paint(Graphics g) {
     super.paint(g);
     g.drawImage(i.getImage(), 0, 0, null);
    }

    public void CloseSplashScreen() {
     setVisible(false);
    }
    
    public static void main(String[] args) {
        CreateSplashScreen sp = new CreateSplashScreen();
        try {
            Thread.sleep(2000);
        } catch (InterruptedException ex) {
            
        }
        sp.CloseSplashScreen();
    }    
}

Note: I do not know about your method to fetch image resource from the source folder.

Edit: Assuming that the name of the package containing your class CreateSplashScreen is createsplashscreen , make sure that the image testImage.png is present in the createsplashscreen package of your project.

Answer 2

@Peter For error code, I deleted one line that I added in mamifest.mf file and build a program... This time, didn't give me an error, weird... I was following error code when I got it and it led me to something like "CLASSPATH" section of application generated code... sorry I can't remember exactly Really appreciate Peter for your help. Wish you luck...