Before, my IntelliJ ran well. But I used java 6 , so my project could not run with gradle.
I switched java to version 8 with the command sudo update-alternatives --config java .
I checked java -version was 1.8.0_312. It's OK, but in IntelliJ, the Java still had version 6. Then, I changed java version in IntelliJ with:
From the main menu, select Help | Find Action or press Ctrl+Shift+A.
Find and select the Choose Boot Java Runtime for the IDE action.
Select the desired runtime and click OK.
And restarted IntelliJ, which could not be opened again. I tried to remove and install it again as well as removing java and installing it again too, but neither did work.
When I run ./idea.sh, I get the following error:
OpenJDK 64-Bit Server VM warning: Archived non-system classes are disabled because the java.system.class.loader property is specified (value = "com.intellij.util.lang.PathClassLoader"). To use archived non-system classes, this property must not be set
Error: LinkageError occurred while loading main class com.intellij.idea.Main
java.lang.ExceptionInInitializerError: null
Now, I'm not even able to "change JRE in intelliJ" as suggested in the comments any more.
I've had the same issue working on windows.
When you check IntelliJ's log (idea.log file) you can find a entry for the change you've made with its 'reset' option.
For me it was: (emphasis is mine)
2022-08-08 09:47:47,906 [ 594730] WARN - Downloader.RuntimeChooserPaths - Set custom boot runtime to: C:\Data\Java\jdk-17.0.3.1 in the C:\Users\username\AppData\Roaming\JetBrains\IntelliJIdea2021.3\idea64.exe.jdk. On errors, please remove the .jdk file
You find the log files are stored at:
Linux: ~/.cache/JetBrains/IntelliJIdea2020.3/log
Windows: %LOCALAPPDATA%\JetBrains\IntelliJIdea2020.3\log
macOS: ~/Library/Logs/JetBrains/IntelliJIdea2020.3