I have installed J2SE runtime Environment 5.0 udate 4 from August Autopachter. I don't know anything of Java but I checked October's EFY it had a calender. I want to know if I need to install J2SE(TM) Development Kit 5.0 Update 5 or above installed component is same. EFY instructs to install Bluej 2.0.1 also that I have downloaded but JDK is about 60 MB. I just want to try out java.