Linux
The machines at the Fermilab computer training center were preinstalled with Scientific Linux Fermi (SLF) 6.3 (32 Bit).
First get the netbeans java jdk bundle from below.
http://www.oracle.com/technetwork/java/javase/downloads/jdk-netbeans-jsp-142931.html
make the installation script executable and execute it (check the Preferences of your Browser to find out where the file is downloaded):
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chmod \+x /\[path to your Download area\]/Downloads/jdk-6u38-nb-7_2_1-linux-i586-ml.sh |
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/\[path to your Download area\]//Downloads/jdk-6u38-nb-7_2_1-linux-i586-ml.sh |
Since the lcsim software is locate in the CVS code repository first get the necessary plugin for netbeans
Select Tools-> Plugins->Available Plugins
then select CVS -> install and accept the licence agreement and click finish
Then to install the lcsim framework
select Team->CVS->Checkout
specify the CVS Root as shown below and leave the password field blank
Open the project and when it asks you for the prime build.This will take a while since initially all necessary libraries need to be downloaded from the maven code repositories. Hopefully in the end it will say:
BUILD SUCCESS
So repeat the process for lcsim: 
Open the project right click on org.lcim and select build. Again this will take a while. To speed up the process in the future you might want to select to skip the tests the next time you build.
org.lcsim_> Properties->Build->Actions-> Build project -> Add-> skipTests=true
org.lcsim_> Properties->Build->Actions-> Clean and Build project -> Add-> skipTests=true 
the latest is 0.9.9:
http://java.freehep.org/maven2/org/freehep/jas-assembly/0.9.9/jas-assembly-0.9.9-distribution.tar.gz