After SiraJ showed us on maemoarena.com that Java is finnaly running on N900,  asrisahalan has managed to shoot a video about it.

 

here is a description how to install Java on N900 (from MicroEmu Wiki):

"Introduction

MicroEmu can be used in two different ways to allow Maemo users using Java ME software. First method uses Sun Java SE for Embedded which has limited 90 days license. Better option would be to use second method as it is a full open source solution, but at the moment it is possible to run only on x86 emulator. Future plans includes making the second method available also for Maemo devices. More details can be found in MaemoRoadmap document.

First method
 

Works either on device or in scratchbox (ARM) 

1. Create microemu-maemo development folder

 mkdir microemu-maemo

 cd microemu-maemo

2. Download and install Sun Java SE for Embedded

Java SE for Embedded 6 EABI, glibc 2.5, Hard Float (VFP), Little Endian

3. Download and install MicroEmulator

 unzip microemulator-3.0.0-SNAPSHOT.zip

4. And finally run the SimpleDemo MIDlet

java -cp microemulator-3.0.0-SNAPSHOT/microemulator.jar:microemulator-3.0.0-SNAPSHOT/apps/microemu-demo.jar org.microemu.app.Main org.microemu.midp.examples.simpledemo.SimpleDemoMIDlet

Second method 

Works only in scratchbox (x86)

1. Create microemu-maemo development folder

 mkdir microemu-maemo

 cd microemu-maemo

2. Download and install JamVM 1.4.5

 tar xjf jamvm-1.4.5.tar.bz2

 cd jamvm-1.4.5

 ./configure

 make install

 cd ..

3. Download and install Jikes 1.22

 tar xjf jikes-1.22.tar.bz2

 cd jikes-1.22

 ./configure

 make install

 cd ..

4. Download and install GNU Classpath 0.93

 tar xzf classpath-0.93.tar.gz

 cd classpath-0.93

 ./configure --with-jikes --disable-plugin

 make install

 cd ..

5. Download and install MicroEmulator

unzip microemulator-3.0.0-SNAPSHOT.zip

6. And finally run the SimpleDemo MIDlet

 jamvm -cp microemulator-3.0.0-SNAPSHOT/microemulator.jar:microemulator-3.0.0-SNAPSHOT/apps/microemu-demo.jar org.microemu.app.Main org.microemu.midp.examples.simpledemo.SimpleDemoMIDlet"

and here is the video about Opera Browser 5

running on MicroEmulator:

 video source:youtube.com/asrisahalan