Lookup Source 
 Select the Lookup Source command  to force a source lookup to take place. If the requested source file is not open, it will be opened and the corresponding line of execution will be highlighted. 

  Debugger
  Local debugging
  Remote debugging
  Changing debugger launch options
  Connecting to a remote VM with the Remote Java application launch configuration
  Disconnecting from a VM
  Launching a Java program
  Preparing to debug
  Resuming the execution of suspended threads
  Running and debugging
  Stepping through the execution of a program
  Suspending threads
  Debug View
  Debug preferences
  Edit Source Lookup