ctrl+f11 ==> run
ctrl+h ==> 全文检索
main+enter ==>public static void main(String[] args) { }
alt+/ ==>智能匹配,有的是ctrl+space
ctrl+i ==>局部缩进
ctrl+shift+o==>快速导包,除包
ctrl+/ ==>单行注释,去除单行注释
ctrl+shift+/==>多行注释
ctrl+shift+\==>去除多行注释
ctrl+shitf+f ==>将程序格式化,搞整洁点
syso+enter==>System.out.printn();