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编辑
Delete Line：Ctrl + Y
- 定义：删除当前行
Find Usages: Alt + F7
- 定义：查找字段或方法的使用位置
- 使用：在字段处按下快捷键（声明的位置和使用的位置都可以），会自动打开
Find窗口，里面显示了该字段的使用位置，包括赋值(write)和读取(read)，如下所示：
Go To Declaration or Usages：Ctrl + B
- 定义：查找字段或方法的声明位置或使用位置
- 使用-跳到字段声明的位置：在使用到该字段的地方，按下快捷键，会自动跳转到声明的位置，如下所示
public static void main(String[] args) {
int num = 10;
// 在num位置按下快捷键，则光标会跳到上面声明num的位置
int count = num;
num = 20;
}- 使用-跳到字段使用的位置：在声明该字段的地方，按下快捷键，会弹出一个框，提示有哪些地方用到了该字段
Go To Implementions: Ctrl + Alt + B
- 定义：跳转到方法的实现位置，多用在接口类中
- 使用：比如我们后台开发常用到的Service和ServiceImpl，在Service接口的方法中，按下快捷键，可以很方便的跳转到ServiceImpl的实现方法中
文件操作
Open Recent Files：Ctrl + E
- 定义：打开最近使用的文件，这样就不用来去tab窗口来回切
