Is there something like python\'s interactive REPL mode, but for Java?
So that I can, for example, type InetAddress.getAllByName( localHostName ) in a window, a
DrJava is an educational IDE that includes an REPL pane.
There is an Eclipse plugin as well, but it hasn't worked for me. I think it just hasn't been updated in a while. So what I generally do is keep a DrJava window open for the "what happens if I do this" questions.
EclipseShell might be good too, but I haven't used it yet.