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.

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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-64f5-1e89472-46cfc.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e89472-46cfc.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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