IDEA簡介

• 截止到2021.08.31，是全世界最流行的Java集成開發環境

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快捷鍵

• ctrl + alt + v：快速生成方法返回值接收代碼
• /** + enter：生成javaDoc注釋

IDEA常見error

Error: java: System Java Compiler was not found in classpath

• Project Settings > Compiler > Java Compiler
  • changed the drop down Use compiler from Javac to Eclipse

Error:java: source level should be comprised in between ‘1.3’ and ‘1.9’ (or ‘5’, ‘5.0’, …, ‘9’ or ‘9.0’): 12

• Preferences部分設置
  • Preferences > Compiler > Java Compiler > Use compiler, 選javac
  • Project bytecode version，選8，根據project sdk來確定
  • Target bytecode version，選8，與Project bytecode version保持一致
• Project structure部分設置
  • Project structure > project > project sdk，選擇1.8
  • Project language level，選SDK default
  • Modules > source > language level, 選Project default

IDEA 破解

• 參考鏈接