常用设置：
1.Tab不用4个空格
Code Style->Java->Tabs and Indents->Use tab character
Code Style->General->Use tab character (例如：版本控制Diff界面按下Tab)
2.可视化Tab和空格
Settings->IDE Settings->Editor->Appearance->Show whitespaces
3.显示代码行数
Settings->IDE Settings->Editor->Appearance->Show line numbers
4.修改代码字体大小
Settings->IDE Settings->Editor->Colors & Fonts ->Font->Save As->改个名字后才能改字体大小
5.鼠标悬浮显示doc
Settings->IDE Settings->Editor->Show quick doc on mouse move
6.空行的Tab和空格被自动干掉
Settings->IDE Settings->Editor->Other->Strip trailing spaces on Save->None常用快捷键：
首先改为Eclipse快捷键(然后大部分快捷键都会跟Eclipse一致了)
Settings->IDE Settings->Keymap->Keymaps选择Eclipse
1.像Eclipse那样快速跳出括号
Keymap->Editor Actions->Complete Current Statement：默认是Ctrl+Shift+Enter；Shift+Enter则不管现在光标在哪个位置,直接新开一行
2.代码提示列表(Eclipse中的Content Assist，Alt+/)
Keymap->Main Menu->Code->Completion->Basic：默认是Ctrl+Space
3.错误修正提示列表(Eclipse中的Quick Fix，Ctrl+1)
Keymap->Other->Show Intention Action：默认是Alt+Enter
4.快速Overried方法
Keymap->Main menu->Code->Override Methods：需要自己设定
5.Eclipse中的outline
Keymap->Main Menu->Navigate->File Structure：默认是Ctrl+F3
6.版本控制中Diff的Next和Prev
Keymap->Other->Move to the next difference：默认是Ctrl+f7
Keymap->Other->Move to the previous difference：默认是Shift+f7
