SpringGrid

The SpringLayout class was added in JDK version 1.4 to support layout in GUI builders. SpringLayout is a very flexible layout manager that can emulate many of the features of other layout managers.

For example, you might define that the left edge of one component is a fixed distance (5 pixels, say) from the right edge of another component.
SpringLayout is, however, very low-level and as such you really should only use it with a GUI builder, rather than attempting to code a spring layout manager by hand Spring layouts do their job by defining directional relationships, or constraints, between the edges of components.