Class Javalaunchhelper Is Implemented in Two Places

Class JavaLaunchHelper is implemented in two places

You can find all the details here:

• IDEA-170117 "objc: Class JavaLaunchHelper is implemented in both ..." warning in Run consoles

It's the old bug in Java on Mac that got triggered by the Java Agent being used by the IDE when starting the app. This message is harmless and is safe to ignore. Oracle developer's comment:

The message is benign, there is no negative impact from this problem
since both copies of that class are identical (compiled from the exact
same source). It is purely a cosmetic issue.

The problem is fixed in Java 9 and in Java 8 update 152.

If it annoys you or affects your apps in any way (it shouldn't), the workaround for IntelliJ IDEA is to disable idea_rt launcher agent by adding idea.no.launcher=true into idea.properties (Help | Edit Custom Properties...). The workaround will take effect on the next restart of the IDE.

I don't recommend disabling IntelliJ IDEA launcher agent, though. It's used for such features as graceful shutdown (Exit button), thread dumps, workarounds a problem with too long command line exceeding OS limits, etc. Losing these features just for the sake of hiding the harmless message is probably not worth it, but it's up to you.

Eclipse is not opening in Mac

You must add the -javaagent:../Eclipse/lombok.jar in eclipse.ini file. It is in /Users/mshikher/Downloads/eclipse/Eclipse.app/Contents/Eclipse/eclipse.ini

Bootrun error when trying to run grails

The warning message Running application... Which one is undefined is not matter. I think your failure cause by wrong password for 'mobileeyeclinic'@'localhost' or may be the MySQL is not running as a service. See this link Class JavaLaunchHelper is implemented in both. One of the two will be used. Which one is undefined for more info

Class JavaLaunchHelper is implemented in both ... libinstrument.dylib. One of the two will be used. Which one is undefined

⚠️ For JetBrains IntelliJ IDEA: Go to Help -> Edit Custom Properties.... Create the file if it asks you to create it. To disable the error message paste the following to the file you created:

idea_rt
idea.no.launcher=true

This will take effect on the restart of the IntelliJ.

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