Inserting a background image on JFrame

Question

I am developing an interactive system for the london 2012 olympics (Not a real one, just a project :-)) I am starting by creating my GUI layout. This is where i have started.
import java.awt.*;        
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import java.util.*;
import java.awt.event.KeyListener;
import java.io.*;
import java.text.*;
public class Assignment extends JFrame  
   private JLabel londOnJLabel;
public Assignment()
          ImageIcon image = new ImageIcon("???.jpg");
          JLabel background = new JLabel(image);
          background.setBounds(0, 0, image.getIconWidth(), image.getIconHeight());
          getLayeredPane().add(background, new Integer(Integer.MIN_VALUE));
private void createUserInterface()
          Container contentPane = getContentPane();
          contentPane.setLayout( null );
          londOnJLabel = new JLabel();
          londOnJLabel.setBounds( 19, 19, 875, 28 );
          londOnJLabel.setText( "LONDON 2012" );
          londOnJLabel.setFont(new Font( "Default", Font.BOLD, 36 ) );
          londOnJLabel.setHorizontalAlignment(JLabel.CENTER );
          contentPane.add( londOnJLabel );
          setTitle( "LONDON 2012" );
          setSize( 1000, 750 );         
          setVisible( true );         
public static void main( String[] args )
      Assignment application = new Assignment();
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
}So at the moment this Just displays LONDON 2012 on my application. Now what i would like to try and do is insert a background image of the olympic rings. How would i go about doing this?
cheers

Answer 1

THFC wrote:
sorry, when u say dont subclass JFrame, are you referring to this?
public Assignment() ....
No I meant don't do this: public class Assignment extends JFrameBut rather do this: do this: public class Assignment extends JPanelFor example:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class Assignment2 extends JPanel
  private static final String FILE_PATH = "myImageFile.jpg"; // !! change this
  private static final String NET_URL_PATH = "http://upload.wikimedia.org/wikipedia/commons/thumb/8/82/Mooring_bollard_at_sunset%2C_Lyme_Regis.jpg/800px-Mooring_bollard_at_sunset%2C_Lyme_Regis.jpg";
  // Photo by Michael Maggs, Wikimedia Commons: http://commons.wikimedia.org/wiki/Image:Mooring_bollard_at_sunset%2C_Lyme_Regis.jpg
  private BufferedImage image = null;
  public Assignment2()
    try
      // first load the image
      //image = ImageIO.read(new File(FILE_PATH));
      image = ImageIO.read(new URL(NET_URL_PATH));
    catch (IOException e)
      e.printStackTrace();
    // then set up the JPanel.  Try to avoid using the "null" layout
    JLabel titleLabel = new JLabel("My Title Goes Here");
    titleLabel.setFont(titleLabel.getFont().deriveFont(Font.BOLD, 36));
    titleLabel.setForeground(Color.lightGray);
    JPanel titlePanel = new JPanel();
    titlePanel.setOpaque(false);
    titlePanel.add(titleLabel);
    setPreferredSize(new Dimension(800, 590));
    setLayout(new BorderLayout());
    add(titlePanel, BorderLayout.NORTH);
  @Override  // here's where I paint my background:
  protected void paintComponent(Graphics g)
    super.paintComponent(g);
    if (image != null)
      g.drawImage(image, 0, 0, this);
  private static void createAndShowUI()
    // Then I only create my JFrame when I need it.  I don't override it.
    // This way, I can use this same code in a JApplet, or a JDialog, or whatever
    JFrame frame = new JFrame("Assignment2");
    frame.getContentPane().add(new Assignment2()); // and add the JPanel to the JFrame here
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.pack();
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
  public static void main(String[] args)
    java.awt.EventQueue.invokeLater(new Runnable()
      public void run()
        createAndShowUI();
}Edited by: Encephalopathic on May 26, 2008 4:11 PM