I wrote some java functions which enable to easily compile and run small java programmes with emacs. For example if you want to test if a programme compiles or produces the right output than you can use this tool.
As I am a java programmer the lisp code I wrote may not be near to optimal or may even be some sort of ugly. But it works.
Of course installing jde is an alternative but for me this turned out to be complicated. Also for large projects
(large number of classes) an IDE like Eclipse is surely the better choice. But in my experience it is quite effective to use javatools for small programmes.
Some features: - the classpath and sourcepath are automatically determined
from environment variables of system and the package statement in the program - for an applet a html file can automatically be generated and run via appletviewer
- when the program is run also console input is possible
javatools.el