Maven with Cygwin - Error: JAVA_HOME is not defined correctly

Question

I'm trying to run Maven on cygwin. I've added maven to the path and my Java home looks like this:

$ echo $JAVA_HOME 
/cygdrive/c/Program Files/Java/jdk1.6.0

Yet when I try to run mvn --version, I get this:

Error: JAVA_HOME is not defined correctly.
  We cannot execute /cygdrive/c/Program Files/Java/jdk1.7.0_01/bin/java

Any idea why it's not working? Java -version works fine, so it's not a problem with java. I've also tried jdk1.6.0 instead.

Running which java gives,

$ which java
/cygdrive/c/windows/system32/java

and java -version gives,

$ java -version
java version "1.7.0_01"
Java(TM) SE Runtime Environment (build 1.7.0_01-b08)
Java HotSpot(TM) Client VM (build 21.1-b02, mixed mode, sharing)

Answer 1

If I run mvn.bat instead of mvn, I didn't have this problem.

So, since Cygwin will run the mvn file, I replaced this mvn file with a softlink (ln -s mvn.bat mvn) to the batch file. This way, running mvn will silently run the mvn.bat which handles these problems gracefully.