title: how to configure JDK as the default JVM in my workspace
body: <p>Im trying to create a new grails project using the IDE GGTS (groovy and grails tool suite )
   but it says that grails needs a JDK and  JRE is not enough , I already installed JDK 1.7 and added the JAVA_HOME to the path 
  i also copied the grails folder and added a GRAILS_HOME to the path 
  in GGTS : </p>
  
  <p>i tried In Window>Preferences>Java>Installed JREs to check JDK1.7.0_51</p>
  
  <p>and </p>
  
  <p>In Window>Preferences>Java>Installed JREs>Execution Environments I choosed JavaSE-1.7 and checked JDK1.7.0_51[perfect match]</p>
  
  <p>the JDK installed is 64 bits and My PC is windows 8 64 bits</p>
  
  <p>but the error persists 
  <img src="https://i.stack.imgur.com/vC3Vy.png" alt="enter image description here"></p>