title: How to run Intellij IDEA 12 as a 64 bit process on Win7?
body: <p>Have anyone tried this? I got one problem here.
  I have seen this post <a href="http://devnet.jetbrains.net/docs/DOC-1185" rel="noreferrer">http://devnet.jetbrains.net/docs/DOC-1185</a> and done as what it said. But seems it doesn't work on my PC. Here are the system variables and Java version.</p>
  
  <p>System variables:
  <img src="https://i.stack.imgur.com/wuu8m.gif" alt="enter image description here"></p>
  
  <p>Java version:
  <img src="https://i.stack.imgur.com/zz0iS.gif" alt="enter image description here"></p>
  
  <p>When I clicked "idea64.exe", an error occurred:</p>
  
  <p><img src="https://i.stack.imgur.com/xXmAy.gif" alt="enter image description here"></p>
  
  <p>You can see "IDEA_JDK" in the first image. It has already been set, right? Even though I add "IDEA_JDK_64", the same error still happens.</p>
  
  <p>As last, I tried "idea.bat" to see the exception details:</p>
  
  <pre><code>Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version n
  umber in .class file
  at java.lang.ClassLoader.defineClass1(Native Method)
  at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
  4)
  at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
  at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
  at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
  at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
  </code></pre>
  
  <p>Seems it's due to inconsistent Java version between IDEA and OS. Should I update JDK to 1.6 or higher? If I want to keep using 1.5, how could I do?</p>