进入

/usr/share/applications

新建文件

sudo gedit idea.desktop

内容为：

[Desktop Entry]
Encoding=UTF-8
Version=1.0
Name=IntelliJ IDEA
GenericName=Java IDE
Comment=IntelliJ IDEA is a code-centric IDE focused on developer    productivity. The editor deeply understands your code and knows its way around the codebase, makes great suggestions right when you need them, and is always ready to help you shape your code.
Exec=/usr/local/lib/idea/bin/idea.sh
Icon=/usr/local/lib/idea/bin/idea.png
Terminal=false
Type=Application
Categories=Development;IDE