Remove border from JComboBox

Question

Do you know any way to remove the border from a JComboBox in Java? I try the following code

public class ComboFrame extends JFrame {
    public ComboFrame()          


        

Answer 1

If you want to use the windows L&F, you can do cmd.setUI(new WindowsComboBoxUI()); If you, however, want to be able to use any L&F, you might be better off using the solution proposed by Jeach.

Answer 2

I did a bit of research and found this bug

I tried it for myself and it does seem to affect the border. You might want to try one or both of the following code blocks for yourself.

for (int i = 0; i < combo.getComponentCount(); i++) 
{
    if (combo.getComponent(i) instanceof JComponent) {
        ((JComponent) combo.getComponent(i)).setBorder(new EmptyBorder(0, 0,0,0));
    }


    if (combo.getComponent(i) instanceof AbstractButton) {
        ((AbstractButton) combo.getComponent(i)).setBorderPainted(false);
    }
}

It is important to note that at the bottom of the bug entry, you can read the following:

The JButton maintains it's own border so JComponent paintBorder() and paintComponent() has no awareness of the JComboBox border.

Good luck,

Jeach!