Load image to jPanel

[DJIT]

hi all,

how can i load image to an jPanel
i see example in Computer Graphics Using Java™ 2D and 3D book, but not using netbeans, it usse the jpanel as a class.

here is my netbeans project.
ImgView.zip

how can i reuse the jpanel paint method to load the image.
thanks.

[fex]

Hello,

Next time, put your code in the post, not as zip. I'm not touching your file for security reasons ;)

You say you are using the JPanel class, I assume you created your own class which extends JPanel. Then simply override paintComponent(Graphics g) method.

    @Override
    public void paintComponent(Graphics g) {
        Graphics2D g2 = (Graphics2D) g;            // adds more functionality
        super.paintComponent(g2);                   // don't forget this !
        if (image != null) {                               // field image
            g.drawImage(image, 0, 0, this);         // draw at point (0,0)
        }
    }

Simply write a file to your image and call for a repaint method, the repaint methode invokes paintComponent method :D

File file = new File("path/to/your/image.jpg");
BufferedImage image = ImageIO.read(file);
this.image = image;                                      // field image is set to local
repaint();

[KevinWorkman]

If all you want to do is display an image, the alternative is to simply load your image as an icon in a JLabel and add that JLabel to the JPanel. If you do it that way, there is no need to subclass JPanel.

[DarrylBurke]

And learn Swing.
Trail: Creating a GUI With JFC/Swing (The Java™ Tutorials)

That's easier than struggling to get things the way you want them in the NetBeans visual designer.

db

[DarrylBurke]

this.image = image;                                      // field image is set to local

fex, what exactly does that comment mean?

db

[fex]

You are storing the local variable named 'image' in the field named 'image'.

[DarrylBurke]

So why have a local variable that's never used? Why not assign the field directly from ImageIO#read(...)?

db

[fex]

Just to clearly show DJIT it's a BufferedImage. Also, a lot of inline code isn't easy for beginning programmers :)