JLabel 不显示图像

Question

I'm not sure where the problem is. Is it in the path? The image doesn't show although there are no errors at all in the code syntax. Should I provide the whole path or just place the image in the directory and call its name? Thank you.

public class NetworkingGame {

private JFrame jfrm;

NetworkingGame(){
    jfrm = new JFrame("Angry Painters");
    jfrm.setSize(800, 480);
    jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    jfrm.setVisible(true);

}// end of constructor

public void ImageLoading(){
    ImageIcon i = new ImageIcon("C:/Users/TOSHIBA/Documents/NetBeansProjects/NetworkingGame/build/classes/angry-painters.jpeg");
    JLabel jl = new JLabel(i);
    jfrm.add(jl);
}

public static void main(String[] args) throws Exception{

    SwingUtilities.invokeLater(new Runnable(){

        @Override
        public void run(){

            NetworkingGame ng = new NetworkingGame();
            ng.ImageLoading();
        } // end of run method
    }); // end of Runnable

   }//end of main method
}//end of class NetworkingGame

Answer 1

Do not use the file path as icon location as this will only work on your computer. You really cannot expect all machines in the world to have C:/Users/TOSHIBA ...angry-painters.jpeg in the right place!

Copy the file next to the source code (.java) class you use and then call

 new ImageIcon(getClass().getResource("angry-painters.jpeg"));

The builder should copy the image resource to the class folder itself.

Answer 2

Try to use path something like this :

jLabel1.setIcon(new ImageIcon("c:\\Users\\xyz\\Documents\\NetBeansProjects\\game\\src\\images.jpg"));

Update

If dis also does not work, then

    jLabel.setIcon(new ImageIcon(getClass().getResource("/image.jpg")));
    jLabel.setText("jLabel");

should.The image.jpg should be inside your project folder.

Answer 3

I think your code doesn't like the way your binding the image.

assumes that your put the images/icons in the source folder

ImageIcon i=new javax.swing.ImageIcon(getClass().getResource("myimage.jpeg"))

or if you create a folder in the source folder

InputStream stream = this.getClass().getClassLoader().getResourceAsStream("/images/image.jpg");
BufferedImage bufferedImage=ImageIO.read(stream);
ImageIcon icon= new ImageIcon(bufferedImage);

Answer 4

in IntellijIdea. 2021 In my case it just didn't read image files. To fix that:

1. make res folder in project root('src's folder sibling)

2. Handle artifact in File->Project Structure->artifacts by + , -

3. File->Project Structure->artifacts->output layout tab make structure of final jar as 'res' folder , app root package folder(say 'com'), and 'META-INF' folder. Fill out them with content from yourapp/output folder and 'res's content from mentioned in 1. step 'res'.

4. After that in 'project structure' 'Modules' rightclick on 'res' and mark it as resources.

5. Declare images like this:

ImageIcon loadingLcl = new ImageIcon(this.getClass().getResource("/res/32.gif")); before putting into JLabel.

Also it s preferable to read image once when initializing the app. Otherwise sometimes it can throw IOException. So if possible handle that at start. Like they do in gamemaking.