Eclipse在哪里找到javac来编译项目？

Question

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 (ie 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 (ie path to javac) is used by Eclipse?

PS OS XP SP2 if it is relevant PPS 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.

Answer 1

Eclipse有JDT ，它包含增量编译器，所以它不需要外部编译器，除非你愿意:)

Answer 2

Eclipse has a list of installed JRE's under window->preferences->java->Installed JRE's . The one selected as the default will be the one included with Eclipse, but you can easily add any other JRE's from this same preference pane, and select any default you wish.

This will be the system wide default, which can be overridden on a project by project basis from the Build Path->Libraries tab. To change, select Add Library->JRE System Library and choose from your configured JRE's. Then remove the library for the default.

Answer 3

Eclipse is shipped with an built-in compiler. You can use an external JDK, if you configure it in the preferences.

Edit: Thanks to André!