Here is what I have:
JAVA_HOME=C:\Software\Java\jdk1.5.0_12 (points to JDK 5.0)
In Eclipse ‘Installed Runtimes’ I have: jre 1.5.0_12 (points to JRE 5.0) jre 1.6.0_3 (points to JRE 6.0) (this one is default)
I do not have ‘javac’ on my PATH (i.e. I cannot run javac -version from command line if I am not in JDK/bin).
My project is set to use jre 1.6.0_3 and compiler’s Compliance Level is set to 6.0.
Question is: how Eclipse is able to compile my project? Where it finds a compiler for 6.0? Moreover, is there a way to tell precisely which compiler (i.e. path to javac) is used by Eclipse?
P.S. OS XP SP2 if it is relevant P.P.S. I do not have any -vm set in eclipse.ini. In eclipse I see eclipse.vm=C:\Program Files\Java\jre6\bin\client\jvm.dll and it is still a JRE.
Eclipse has the JDT which includes the incremental compiler so it does not need an external one unless that is your wish 🙂