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Where does Eclipse find javac to compile a project?

Here is what I have: JAVA_HOME=C:SoftwareJavajdk1.5.0_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 …

Here is what I have:

JAVA_HOME=C:SoftwareJavajdk1.5.0_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 FilesJavajre6binclientjvm.dll and it is still a JRE.

Answer

Eclipse has the JDT which includes the incremental compiler so it does not need an external one unless that is your wish 🙂

Source: stackoverflow
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