IDEA万能快捷键，你不知道的17个实用技巧！！！

男娘i 2023-07-11 05:44 7阅读 0赞

**说明**

`IDEA`里有一个万能快捷键(`alt + enter`)，功能非常强大，同一个快捷键，可以根据不同的语境提示你不同的操作，  
很多人可能还不了解这些功能，在处理代码的时候还手动处理，了解这些技巧之后，你编码也是一种享受。

万能快捷键可以帮你做很多事情，我大概总结了17点：

### 文章目录 ###

*   *  转换lambda表达式
     *  equals的翻转
     *  自动导包
     *  异常捕获
     *  SimpleDateFormat转换为ThreadLocal封装的SimpleDateFormat
     *  注释移动
     *  便捷的json字符串处理
     *  转化为高效运算的二进制
     *  if……else变成简单三目运算 以及一些简化操作
     *  引入局部变量
     *  实现接口
     *  实现抽象类
     *  修复方法返回值、增加入参、减少入参、方法生成等
     *  字符串相关操作
     *  ， + < 等位置互换
     *  java访问修饰符的更改操作
     *  自动生成属性操作

为了能让大家更直观的看到效果，我录制了GIF演示。

## 转换lambda表达式 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MDUwNzAwNC0xNDEwMjQ4MDQxLmdpZg]

## equals的翻转 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MDUzODAyNS0xMjA4NjAzMzQzLmdpZg]

## 自动导包 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MDgyMjc1MS0xODYzMzQzMDgzLmdpZg]

## 异常捕获 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MDkwOTY0NS0xOTY1MjIwODg2LmdpZg]

## SimpleDateFormat转换为ThreadLocal封装的SimpleDateFormat ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MTE0MjY0MS0xNTc0NTE3MzcxLmdpZg]

## 注释移动 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MTI1NzI3MC0xMjA1NzU3NTM3LmdpZg]

## 便捷的json字符串处理 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MTUyNDk4Ny04NjkzMjc3NjguZ2lm]

## 转化为高效运算的二进制 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MTYwMTg5Ny0zOTI5NzM4LmdpZg]

## if……else变成简单三目运算 以及一些简化操作 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MTY1MDkxMC0xMzMzMjMyMTAwLmdpZg]

## 引入局部变量 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MjAxNzMzNi00NzgwMDY2MjUuZ2lm]

## 实现接口 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MjA0NzcxNi0yMjkxOTA0MTguZ2lm]

## 实现抽象类 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MjE0NTY4My03OTg2MDY2OTMuZ2lm]

## 修复方法返回值、增加入参、减少入参、方法生成等 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MjI0MDc5NS0xMzgzNDkxMzYzLmdpZg]

## 字符串相关操作 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MjM0ODA1NS0xMjUxMzc3MDEwLmdpZg]

## ， + < 等位置互换 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MjcxMTg2My0xOTM0ODIzOTAzLmdpZg]

## java访问修饰符的更改操作 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0MjgwNDA4NS03ODk4NzM1NjMuZ2lm]

## 自动生成属性操作 ##

![在这里插入图片描述][aHR0cHM6Ly9pbWcyMDE4LmNuYmxvZ3MuY29tL2Jsb2cvMTEyMDQwMi8yMDE5MDgvMTEyMDQwMi0yMDE5MDgwNTE0Mjg1OTQzOC0yMDEzNTQyNTM1LmdpZg]

总结：万能快捷键很牛掰，在不知道什么操作的时候，试试按一下吧，可能会给你惊喜哦！！！

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