Re: Change the image of the image Background panel

Question

Hi guys,
I m wondering how can i change the background of the image I had set earlier on as the background of the JPanel using the overriding of paintComponent() method.
What i need to do is to create a swing component with a changing image background abilities.. can anyone help me with it.. its urgent.. thanks!!!

Answer 1

Hi.
Please see code below. I hope it help you.
Change the image name at the constructor of MainFrame.java and put that image to folder with class files.
MainFrame.java:
import javax.swing.*;
public class MainFrame extends JFrame {
  public MainFrame () {
    ChangeBGImage panel = new ChangeBGImage();
    panel.setImage("ukr.jpg");
    getContentPane().add(panel);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  public static void main (String[] args) {
    MainFrame frame = new MainFrame();
    frame.setSize(400, 300);
    frame.setVisible(true);
}ChangeBGImage.java:
import java.awt.*;
import java.awt.image.*;
import javax.swing.*;
public class ChangeBGImage extends JPanel {
  Image image;
  public ChangeBGImage (Image image) {
    this.image = image;
  public ChangeBGImage () {
    image = null;
  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    if (image != null) {
      Rectangle rectFull = new Rectangle(0, 0, getSize().width, getSize().height);
      Graphics2D g2d = (Graphics2D)g;
      BufferedImage buffImg = new BufferedImage(image.getWidth(this), image.getHeight(this), BufferedImage.TYPE_INT_RGB);
      Graphics2D g2d2 = buffImg.createGraphics();
      g2d2.drawImage(image, 0, 0, this);
      TexturePaint imagePaint = new TexturePaint(buffImg, new Rectangle(0, 0, image.getWidth(this), image.getHeight(this)));
      g2d.setPaint(imagePaint);
      g2d.fill(rectFull);
  public void setImage(String imageURL) {
    MediaTracker mt = new MediaTracker(this);
    image = Toolkit.getDefaultToolkit().getImage(imageURL);
    mt.addImage(image, 0);
    try {
      mt.waitForID(0);
    } catch (InterruptedException ex) {
      ex.printStackTrace();
  public void setImage (Image newImage) {
    image = newImage;
Sincerely,
Victor Letunovsky
AlarIT programmer
http://www.AlarIT.com