You simply need to set the disabled icon of the button to the same value as the icon of the button. See this example:
On the left a button where I have set both icon and disabledIcon. On the right I have only set the icon:
import java.awt.BorderLayout;
import java.net.MalformedURLException;
import java.net.URL;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
public class TestDisabledButtons {
public static final String CARD_URL = "http://assets0.wordansassets.com/wvc-1345850020/wordansfiles/images/2012/8/24/156256/156256_340.jpg";
protected void createAndShowGUI() throws MalformedURLException {
JFrame frame = new JFrame("Test button");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
ImageIcon imageIcon = new ImageIcon(new URL(CARD_URL));
JButton button = new JButton(imageIcon);
JButton button2 = new JButton(imageIcon);
button.setDisabledIcon(imageIcon);
button.setEnabled(false);
button2.setEnabled(false);
frame.add(button, BorderLayout.WEST);
frame.add(button2, BorderLayout.EAST);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
try {
new TestDisabledButtons().createAndShowGUI();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
}
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