om. om. - 1 year ago 63
Java Question

How to set an image as a background for Frame in Swing GUI of java?

I have created one GUI using Swing of Java. I have to now set one sample.jpeg image as a background to the frame on which I have put my components.How to do that ?

Answer Source

There is no concept of a "background image" in a JPanel, so one would have to write their own way to implement such a feature.

One way to achieve this would be to override the paintComponent method to draw a background image on each time the JPanel is refreshed.

For example, one would subclass a JPanel, and add a field to hold the background image, and override the paintComponent method:

public class JPanelWithBackground extends JPanel {

  private Image backgroundImage;

  // Some code to initialize the background image.
  // Here, we use the constructor to load the image. This
  // can vary depending on the use case of the panel.
  public JPanelWithBackground(String fileName) throws IOException {
    backgroundImage = File(fileName));

  public void paintComponent(Graphics g) {

    // Draw the background image.
    g.drawImage(backgroundImage, 0, 0, this);

(Above code has not been tested.)

The following code could be used to add the JPanelWithBackground into a JFrame:

JFrame f = new JFrame();
f.getContentPane().add(new JPanelWithBackground("sample.jpeg"));

In this example, the method was used to read in the external JPEG file.

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