Question

I’ve just installed proper JRE rather than the OpenJDK, I was wondering if there is an easy way to find out which RE Eclipse is using? Maybe in a help menu or something.

Thanks

Answer 1

Go to Window > Preferences > Java > Installed JREs. The checked JRE is the one which Eclipse uses by default. This JRE is used to compile and run the code.

The JRE used by Eclipse to run itself is the either the one specified in the eclipse.ini or the java executable in your system path. From the Eclipse docs:

Find the JVM

If a JVM is installed in the eclipse/jre directory, Eclipse will use
it; otherwise the launcher will consult the eclipse.ini file and the
system path variable. Eclipse DOES NOT consult the JAVA_HOME
environment variable.

To explicitly specify a JVM of your choice, you can use the -vm
command line argument:

eclipse -vm c:\jre\bin\javaw.exe ”start Java by executing the specified java executable
eclipse -vm c:\jre\bin\client\jvm.dll ”start Java by loading the jvm in the eclipse process