eclipse on ubuntu

Once the JVM is installed...., we can start to use eclipse as our IDE.

0. download eclipse

1. change owned by root on eclipse directory
sudo chown -R root:root /directory of eclipse

2. make eclipse executable (jump to the directory locates eclipse)
sudo chmod +x eclipse

3. eclipse executable
sudo touch /directory of eclipse
sudo chmod 755 /directory of eclipse
sudo vi /directory of eclipse

4. before the 1st run:
eclipse -clean