Giving a JPanel a percentage-based width

Question

What\'s the easiest way to make a JPanel that takes up a fixed percentage of its parent container, by width?

Its width should update when that of its pa

Answer 1

You could use the Relative Layout. This layout was designed for this purpose since none of the layouts from the JDK support this directly (and easily).

As a simple example you could have 3 panels at 25%, 25% and 50% of the width:

RelativeLayout rl = new RelativeLayout(RelativeLayout.X_AXIS);
rl.setFill( true );
JPanel panel = new JPanel( rl );
panel.add(red, new Float(25);
panel.add(green, new Float(25));
panel.add(blue, new Float(50));