1. Set display mode of package Switch between the 3 options (Flatten Packages, Compact Middle Packages, Hide Empty Middle Packages) in the pop-up menu upon settings button in the project window   2. Add jar file as library Trigger the option 'Add as Librar...' in the context menu upon jar file.   3. Set Auto Import Check the 2 options: Add unambiguous imports on the fly, Optimize imports on the fly (for current project) under the directory: File=>Settings=>Editor=>General=>Auto Import   4. Shortcut Key for Import Alt+Enter   5. 打開Generate Alt+INSERT 右擊菜單=>Generate自動創建構造函數 toString   6.CTRL*ALT*T打开surround with   7. new完之后，ALT+ENTER 导入包 自动修正 自动补全变量名   8 双击shift键打开文件搜索对话框