please setup up JAVA_HOME only. Remove the JAVA entry from PATH. On my machine my JAVA_Home points to:
and it works fine. I have seen that error when building JAVA project in netbeans. This was raised by an empty file without extension with the name "java" and "javac". Check your bin folder of the JDK installation for those files. If they are in there, remove them or give them an extension, e.g. .old.