The Eclipse version is always for free! If you want to use
MyEclipse you can choose between different versions depending on your needs, but you'll have to pay (compared with other tools it's still very cheap). But for OCMJD I just used the latest version of
Eclipse for Java Developers. And I used MyEclipse at a former company, so could be me
Now just using Eclipse (for RCP and RAP Developers, combined with the WTP).
And as a side note: not using an IDE at all for developing your assignment I guess you just used a text editor and java/javac commands I'm pretty sure you spend a bunch of unneeded hours. Investing 2-3 hours in basic use of Eclipse would have saved you days, maybe even weeks (generating getters/setters, javadoc generation, formatting, detecting compiler errors due to typos,... you get it all for free)