title: Eclipse: 'System' cannot be resolved
body: <p>First i installed java 7.0 update 25 and then installed eclipse.
  Later as per requirement, I uninstalled this java version and installed earlier version 5.0</p>
  
  <p>Now in every eclipse program, it is showing error with word 'System'.
  Solution is to add path of java.exe to eclipse.
  Can anyone guide me to do it?</p>