Eclipse running under JRE

Hello gurus...
I have seen eclipse working under JRE only. But how it can compile java files to class files if there is no javac.
any clues???

phoenix-supratim wrote:
But could you be more specific. Exactly which compiler you are talking about.The eclipse compiler. I don't know how to be more specific than that. They have created their own compiler so you don't need a JDK to use it (and possibly for other reasons).
Is there any other compiler available to compile java files to class files.Well, I guess OpenJDK have their own compiler too.
If that is the case then for running jar files it needs a JVM. And if a JVM is already there in eclipse it should'nt have asked for a JRE in the first place.[Eclipse atleast need a jre to run]I didn't say Eclipse has its own JVM. I said it has its own compiler. It requires a JRE because JRE contains the JVM that is used to run any Java programs.
Another thing I would like to know. I have added MAVEN plugin in my eclipse. I noticed that when eclipse working under JRE only, MAVEN gives warning that a jdk JVM should be there to successfully run MAVEN. Beacause it needs some jar files from JDK. Exactly which jar files does MAVEN need from JDK and which way those jar files are different from JRE jar files.JDK has additional libraries that the JRE doesn't have.
Because all the jar files JDK have to initialize and run a JVM are all there in JRE.JDK includes the JRE, which includes the JVM. And the JDK does have things that the JRE doesn't (like the compiler).

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