编译时报 OOM
Preferences -> Build,Execution,Deployment -> Compiler
shared build process heap size   改成  2048 M  (默认700M)



编译时报 StackOverflowError
Preferences -> Build,Execution,Deployment -> Compiler

shared build process VM OPTIONS  -Xss4m

编译排除的类

Preferences -> Build,Execution,Deployment -> Compiler 
excludes 

配置 IDEA 插件仓库源
File / Settings / Plugins / 设置（小齿轮）/ Manage Plgin Repositories


idea2021 windows7  导入 maven 项目 无法 识别 String 
换成 idea2019 配置SDK后搞定
idea2019 导入 maven 多模块项目 ，需要手工添加模块
Project Struct / modules  加号 添加 模块

IntelliJ IDEA 2021.3.1 (Community Edition)

view / Appearance 
  toolbar   （前进后退按钮等）
  navigation bar
  tool window bars
  status bar
  details in tree view
  members in navigation bar





git 提交前 关闭代码分析
Preferences / version control / commit / before commit

build project    编译修改过的文件
rebuild project  重新编译整个项目

help /  change memory setting
help / edit Custom VM Options

Preferences -> Appearance & Behavior -> Appearance -> Theme

Preferences -> Editor -> File Encodings

Preferences -> Editor -> General -> Code Completion
Case sensitive completion 设置成 Node, 不区分大小写

Preferences -> Editor -> General -> Auto Import

勾选
Add unambiguous imports on the fly
Optimize imports on the fly (for current project)

Preferences -> Editor -> Code Style -> Java -> Imports


Class count to use import whith '*' 
超过指定个数，换成 * 号 ，建议设置成大一些 

Name count to use static import with '*'
控制静态属性引入 , 建议保留默认值 ‘3’

Preferences -> Editor -> Code Style -> Java -> Code Generation

勾选
Line comment at first column


Preferences -> Build,Execution,Deployment -> Compiler

取消自动编译 
Build projet automatically

调整编译内存 建议1024M以上
Build process heap size(Mbytes) 

Preferences -> Build,Execution,Deployment -> Compiler -> Java Compiler

Project bytecode version   建议8


 IDEA 使用技巧