Holger Staudacher posted an article with some tools that you should know about when developing Java code: “A Software Craftsman’s Toolbox: Lightweight Java libraries that make life easier.”
Along the same lines, Jeeeyul came up with an idea to make
System.out.println( "Hello World." );
produce this output:
(MyHelloWorld.java:10) : Hello World.
Just takes 34 lines of code: “Make System.out.println() Rocks!“