Swing - Irregular button array layout

Question

Is there some way to have a set of JButton objects that aren't in a standard 'Grid' shape? I'm specifically looking to make a set of buttons that are different shapes and sizes, like the bottom two rows of the Microsoft Calculator.

Here is an example of what I want the buttons to look like:

Answer 1

GridBagLayout is natural choice for requested layout. You can spread buttons evenly, occupy range of cells or even choose size for each particular cell. Here is good example.