1.直接打开某类:ctrl+shift+t2.注释某类:ctrl+?3. implementation :Ctrl+T4.rename:Alt +Shirft +R5.Show Intention Actions:Alt+Enter6.搜索方法被调用:Ctrl+G7.自动导入包 alt+Enter8.Alt+回车 导入包,自动修正9.Alt+Insert 生成代码(如get,set方法,构造函数等)