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PO
 

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    <p>There is no concept of a "background image" in a <a href="http://java.sun.com/javase/6/docs/api/javax/swing/JPanel.html" rel="noreferrer"><code>JPanel</code></a>, so one would have to write their own way to implement such a feature.</p> <p>One way to achieve this would be to override the <a href="http://java.sun.com/javase/6/docs/api/javax/swing/JComponent.html#paintComponent(java.awt.Graphics)" rel="noreferrer"><code>paintComponent</code></a> method to draw a background image on each time the <code>JPanel</code> is refreshed.</p> <p>For example, one would subclass a <code>JPanel</code>, and add a field to hold the background image, and override the <code>paintComponent</code> method:</p> <pre><code>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 = ImageIO.read(new File(fileName)); } public void paintComponent(Graphics g) { super.paintComponent(g); // Draw the background image. g.drawImage(backgroundImage, 0, 0, this); } } </code></pre> <p>(Above code has not been tested.)</p> <p>The following code could be used to add the <code>JPanelWithBackground</code> into a <code>JFrame</code>:</p> <pre><code>JFrame f = new JFrame(); f.getContentPane().add(new JPanelWithBackground("sample.jpeg")); </code></pre> <p>In this example, the <a href="http://java.sun.com/javase/6/docs/api/javax/imageio/ImageIO.html#read(java.io.File)" rel="noreferrer"><code>ImageIO.read(File)</code></a> method was used to read in the external JPEG file.</p>
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    1. POHow to set an image as a background for Frame in Swing GUI of java?
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    1. USGuillaume Polet
    1. UScoobird
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    1. POHow to set an image as a background for Frame in Swing GUI of java?
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    1. COThis doesn't quite answer the question. It puts a background image on a panel, but then it just inserts the panel into the normal layout. The question was how to set a background on a frame behind other components.
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