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Where to add compiler options like -ea in IntelliJ IDEA?

I want to add the -ea option. I set it in Project Settings --> Compiler --> Java Compiler : Additional command line parameters.

But it caused a make error: invalid flag: -ea. P.S.: the above error message may not be the same as yours, because IntelliJ showed error in my native language, not English. I translated it into English.

Solution

  • The -ea option to enable assertions is passed to the JVM not to the compiler. Add it as a VM option for your runtime configuration.

    Specific location in the menu: Run > Edit Configurations... > Configuration > VM options:

    Where to put the <code>-ea</code> flag