I got a problem about JFrame.

[Yanxin Zhao]

Hi, everybody,
I wanted to implemented that a JButton in a JFrame, And when I click which button, a picture will be displayed on the JFrame. But how can I enable the size of the JFrame be changed into a suitable size ? And this is also my problem.

[Stuart Gray]

You use setSize(width, height) to change the size of a JFrame. How are you getting/storing the image? The Image class has getHeight() and getWidth() methods.

[Kai Witte]

hello,

when the Component that displays your image automatically has the correct preferred size, you can use JFrame#pack().

Conan

[Yanxin Zhao]

Thanks so much for your replyes. But I do not think that setSize() and pack() can do what I wanted to do. I used this to show my pic.

public class ImagePanel extends JPanel{
    Image image;
 
    ImagePanel(Image image) {
        this.image = image;
    }
 
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        int height = image.getHeight(this);
        int width = image.getWidth(this);
        setSize(height,width);
        g.drawImage(image, 0, 0, this); 
    }
} 
  

Although the pic can be add into JFrame, but the size of JFrame still can not be changed.

[Stuart Gray]

Hmm, I tried changing your code and making it change the size of the parent component as well, but that didn't work either. Now I'm kind of stuck too