IDE and JDK

To be honest, we're now getting to the point where you'll want to start coding this stuff yourself.

Best bet - go grab IDEA InteliJ from here, and the Java Developer Kit (JDK) from here (the second one from the top title 'Java SE Development Kit (JDK)').

Install the JDK first into the default location, then IntelliJ.

Create a new project, from scratch in IntelliJ. Call it Test. Keep all other screens to the default settings until done.

IntelliJ should detect the JDK, check it has by going to 'File', 'Settings' then under 'Project Settings' there is 'Project Settings' (again). Click on 'JDK' under 'Platform Settings'. If your JDK isn't set, click on the + button and point to where you installed the JDK, probably something like: c:\program files\java\JDK1.6.0_06

Et voila, you have an Integrated Development Environment setup for developing Java.