1.Information:java:javacTask: Source release 1.8 requires target release 1.8
Error:(31, 62) java: lambda expressions are not supported in -source 1.7
(please use -source 8 or higher to enable lambda expressions)
There are three places to modify the compiled version in the idea.
Two places are confirmed in Project Structure->Modules: Project sdk and project language level Project Structure->Language level Settings->java Compiler->Per-module bytecode Version
in Sources in Modules
2. Shortcut keys for adding multi-line comments at one time
First select the area to be annotated, then
ctrl+/ This is a multi-line code line comment, one comment symbol per line
ctrl+shift+/ This is a multi-line code comment in a block, only with comment symbols at the beginning and end
3. Cancel multi-line comment shortcuts
How to add shortcut keys, cancel with the same method,
Such as ctrl+/ to add a comment, then ctrl+/ to uncomment
ctrl+shift+/ to add a comment, then ctrl+shift+/ to uncomment
4. Change the theme package in idea
https://jingyan.baidu.com/article/c910274b80af45cd361d2db6.html
5. How to change the font size in idea
https://www.cnblogs.com/CATHY-MU/p/5971647.html
6. No debug is displayed in idea, only messages are displayed
You need to click run/debug on the toolbar under the menu bar before you can see the debug console