Difference between "rigid area" and "strut" in Box

Question

Could someone please explain the differences between

Box.createRigidArea(dimension)

and

Box.createHorizontalStrut(width)

Box.createVerticalStrut(height)

Is "Rigid area" a strut whose both dimensions can be user-specified, or is there more to it?

Answer 1

From the tutorial

http://docs.oracle.com/javase/tutorial/uiswing/layout/box.html

It looks like using struts as a filler may present problems when composing different BoxLayouts meanwhile rigid areas are more flexible since they allow you to specify both dimensions.