set eclipse on ubuntu

set superuser in ubuntu: sudo passwd

move taskbar to bottom: gsettings set com.canonical.Unity.Launcher launcher-position Bottom

set shortcut on ubuntu:

close window: shift+ctrl+J

minimize window: shift+ctrl+M

sudo apt-get update

sudo apt-get -y upgrade

edit the file: ~/.bashrc

# set jdk env:
export JAVA_HOME=/home/groot/Videos/jdk_7_jdk/jdk1.7.0_79
export JRE_HOME={JAVA_HOME}/jre
export PATH=${JAVA_HOME}/bin:$PATH

source ~/.bashrc

terminal: java, javac

set jdk version:

sudo update-alternatives --install /usr/bin/java java /home/groot/Videos/jdk_7_jdk/jdk1.7.0_79/bin/java 500

sudo update-alternatives --config java

after this, you can start eclipse.