How to divide a JPanel into left and right segments?

Question

I want to divide a JPanel into left and right segments. How do I do that ? After that, I will place panels in the left and right half.

Answer 1

If there is no need to resize them, you can simply use a BorderLayout and insert your panels in the BorderLayout.EAST and BorderLayout.WEST:

JPanel panel = new JPanel( new BorderLayout() );
panel.add( leftPanel, BorderLayout.WEST );
panel.add( rightPanel, BorderLayout.EAST );

You could also consider using a JSplitPane which allows to resize the UI:

JSplitPane pane = new JSplitPane( JSplitPane.HORIZONTAL_SPLIT, 
                                  leftPanel, rightPanel );