title: everything is red in eclipse
body: <p>I just downloaded jre7 (C:\Program Files\Java\jre7) and eclipse (Eclipse IDE for Java Developers Version: Indigo Service Release 1) (C:\Documents and Settings\mike\Desktop\eclipse2) and everything is showing up with a red underline in my code.  What is causing this and how can i resolve it?</p>
  
  <p>I also get a "Could not find main class."  error when I run anything.  And this error:</p>
  
  <pre><code>java.lang.UnsupportedClassVersionError: Miner_and_Alchemist_v2 (Unsupported major.minor version 50.0)
      at java.lang.ClassLoader.defineClass0(Native Method)
      at java.lang.ClassLoader.defineClass(Unknown Source)
      at java.security.SecureClassLoader.defineClass(Unknown Source)
      at java.net.URLClassLoader.defineClass(Unknown Source)
      at java.net.URLClassLoader.access$100(Unknown Source)
      at java.net.URLClassLoader$1.run(Unknown Source)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(Unknown Source)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      at java.lang.ClassLoader.loadClassInternal(Unknown Source)
  Exception in thread "main" 
  </code></pre>