I pointed the JAVA_HOME to to C:\Program Files (x86)\Java\jre7 It. It works fine. Afterwards, I unzippedunzipped ant and set up the environment variables related to Ant, I got the following error messages after typing "ant -version"

I searched this forum. Looks like one solution iis to point Java to JDK instead of JRE. I am not exactly sure whether this should be the solution. In other words, in general, which one should JAVA_HOME point to? JDK or JRE?