Maven build failed: "Unable to locate the Javac Compiler in: jre or jdk issue"

File eclipse.ini needs the vm argument to point to your JDK location.

Edit the eclipse.ini file to point to your JDK home, something as follows -

-vm
C:\Program Files\Java\jdk1.6.0_06

This ensures that Eclipse would be running off the JDK and not any default JRE on your machine.

You could try updating the JDK Eclipse is using, as follows:

Add and set the JRE in menu Window → Preferences... → Java → Installed JREs:

JRE type: Standard VM JRE
Name: jdk1.6.0_18
JRE home directory: C:\Program Files (x86)\Java\jdk1.6.0_18

If this is not the case, it's possible that the brackets and spaces in the JAVA_HOME path are causing issues. Try copying your JDK to a different location and updating your JAVA_HOME.

You try:

Go to Preferences/Java/Installed JREs and add one for the location "C:\Program Files\Java\jdk1.6.0_27\jre or something like that.

Remove the one for C:\Program Files\Java\jre6

As you can see, the path C:\Program Files\Java\jre6\..\lib\tools.jar only makes sense if the first part (til the /..) is replaced by C:\Program Files\Java\jdk1.6.0_27\jre.