Is there something like python's interactive REPL mode, but for Java?

Question

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

Answer 1

For folks with access to Mathematica, JLink lets you access Java and script with Mathematica code:

Needs["JLink`"]
LoadJavaClass["java.net.InetAddress"]
InetAddress`getAllByName["localhost"]

Hit Shift-Enter to evaluate, and you get

{<>}

Then you can use Mathematica's Map function to call toString on the returned objects:

#@toString[]& /@ %

to get the result (or to use the less obscure syntax, Map[Function[obj, obj@toString[]], %]):

{"localhost/127.0.0.1"}

If you start to get serious with this, you'll want to read Todd Gayley's tutorial at http://reference.wolfram.com/mathematica/JLink/tutorial/Overview.html.