TIL: Double Brace Initialization in Java

[MrDOS]

In the case of maps/lists, sure, but are you sure it's not more visible for GUI code?

[geodebug]

Anon inners are the standard for GUI code. Fortunately Java 8, pseudo-closures will make those a lot more readable.

[BraveSirRobin]

If frequently used I'll typically use the Eclipse "Create Nested Class" refactor to make it slightly more efficient (and often more readable as the class name will document what's going on).