MPLABX is the integrated IDE of Microchip to develop software for PIC microcontrolers and work under Windows, Linux and MacOS.
I've recently installed LMDE with UpdatePack4 and I tried to install MPLABX v1.10 but the installer did not ran. Then i realized that problems refers to Java because this package is not available in the repos and openjdk doesn't work with MPLABX.
The solution to run MPLABX installer is instal sun-java6-jre, ia32-sun-java6-jre and his dependences from debian squeeze's repos.
1) Add the following line to the source list. (/etc/apt/sourcelist)
deb http://ftp.debian.org/debian squeeze main contrib non-free
2) Update and install the packages
sudo apt-get update && sudo apt-get install sun-java6-jre ia32-sun-java6-jre
3) Now you can run the MPLAB installer normally. Do not forget undo the changes to the source list
I hope this info to be useful