It can run java-script - but i do not think it can run full java files (Pretty sure it can not)
It can however play flash based games (Or at least some)
Beli you might want to check Overlords previous threads and level of experience before recommended a thread that starts with this:
Originally Posted by
It worked fine for me to install java (through apt-get netbeans from debian/lenny) after repartitioning the N900. I'm able to compile and run (javac/java) JAVA- (.class-)files now on my device.