Problem with macos switching jdk version

problem description

system version: macos10.13.6-2018003 update
coexistence of jdk7 and jdk8 versions according to online configuration, alias command switching, I do not know whether it is successful

screenshot of the question

>> .bash_profile

Macos java jdk
Feb.16,2022

7 is still very different from 8, but the syntax of 7 can be run in 8. If there are no special requirements, just install 8. When writing code, be careful not to write a higher version of the syntax for the lower version to run. Jdk backward compatibility does very well.

Previous: May I ask the test get of rails to report an error like this?

Next: How does flask's built-in web server open many processes or threads?

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bd921e-3950e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bd921e-3950e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?