How do I place image in the background of JFrame ?

[raj varma]

How do I place image in the background of JFrame ?
I have tried the following but it is not working.
Please Help !

/* testbackground image */
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class TestBackgroundextends JFrame {
String urlToImage = "beach.jpg";
Image tileImage;
public void paintComponent(Graphics g) {
    int width = getWidth();
    int height = getHeight();
    int imageW = tileImage.getWidth(this);
    int imageH = tileImage.getHeight(this);

    // Tile the image to fill our area.
 //   for (int x = 0; x < width; x += imageW) {
   //     for (int y = 0; y < height; y += imageH) {
            g.drawImage(tileImage, 0, 0, this);
   ///     }
   // }
}


//contructor -1
public TestBackground(){
super("Tests Background with Image");
getContentPane().setLayout(new FlowLayout());
getContentPane().add(new Button("wow"));
Image tileImage = new ImageIcon(urlToImage).getImage();
pack();
setSize(400,400);

}

public static void main(String args[]){
new TestBackground().show();
}
}

[ May 05, 2003: Message edited by: raj varma ]

[indian greenhorn]

Hello, it is not possible to put the image directly on the JFrame or on a JPanel. One way to make it is to set the image (should have good size)on a JLabel and when you add the JLabel it will appear as it is a background image. You can also add components over this image. This way you can achieve your requirement of background image to the JFrame.
regards

[Nathan Pruett]

You can't draw it to the JFrame itself (just like the previous poster said), but instead of using JLabel, I would create a custom panel to display the image so I could add components on top of it easily. Then you can set that panel as the content pane of the frame. Below is some code I had that shows how to do this:

import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.awt.image.WritableRaster;
 
import javax.swing.JFrame;
import javax.swing.JPanel;
 
public class TranslucentPanel extends JPanel { 
    
    private Image i;
    private int opacity;
    
    public TranslucentPanel() {
        this( null );
    }
    
    public TranslucentPanel( Image i ) {
        this.i = i;
        opacity = 255;
    }
    
    public Image getImage() { 
        return i;
    }
    
    public void setImage( Image i ) {
        this.i = i;
        repaint();
    }
    
    public void setOpacity( int opacity ) {
        if ( i != null ) {
            this.opacity = opacity;
            int width = i.getWidth( this );
            int height = i.getHeight( this );
            BufferedImage bi = new BufferedImage( width, height, 
                    BufferedImage.TYPE_INT_ARGB );
            bi.getGraphics().drawImage( i, 0, 0, this );
            WritableRaster pixels = bi.getAlphaRaster();
            int[] o = new int[ width * height ];
            for ( int i = 0; i < o.length; i++ ) {
                o[i] = opacity;
            }
            for ( int x = 0; x < pixels.getWidth(); x++ ) {
                for ( int y = 0; y < pixels.getHeight(); y++ ) {
                    pixels.setPixel( x, y, o );
                }
            }
            i = bi;
        }
        repaint();
    }
    
    public int getOpacity() {
        return opacity;
    }
    
    public void paintComponent( Graphics g ) {
        super.paintComponent( g );
        if ( i != null ) {
            int w = getWidth();
            int h = getHeight();
            int iw = i.getWidth( this );
            int ih = i.getHeight( this );
            int x = ( w - iw ) / 2;
            int y = ( h - ih ) / 2;
            g.drawImage( i, x, y, this );
        }
    }
  
    public static void main(String[] args) {
        JFrame f = new JFrame( "TranslucentPanel Test" );
        TranslucentPanel tp = new TranslucentPanel();
        tp.setLayout( new BorderLayout() );
        Image i = Toolkit.getDefaultToolkit().getImage( "background02.gif" );
        MediaTracker tracker = new MediaTracker( f );
        tracker.addImage( i, 0 );
        try {
            tracker.waitForAll();
        }
        catch ( InterruptedException x ) {
            x.printStackTrace();
        }
        tp.setImage( i );
        tp.setOpacity( 34 );
        f.setContentPane( tp );
        f.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
        f.setBounds( 100, 100, 400, 400 );
        f.setVisible( true );
    }
}