ubuntu repository: https://launchpad.net/~mmk2410/+archive/ubuntu/intellij-idea
To use it just run the following commands:
1.sudo apt-add-repository ppa:mmk2410/intellij-idea
2.sudo apt-get update
3.The community edition can then installed with(安裝社區版用這條語句)
sudo apt-get install intellij-idea-community
4.the ultimate edition with（安裝旗艦版用這條語句）
sudo apt-get install intellij-idea-ultimate