title: See where variable value is set when debugging in Eclipse
body: <p>I would like to know if when debugging in Eclipse, is there a feature/way to focus on a variable and "back-track" where the variable got its value..? I hope I'm being clear enough, but I can see if this appears as a weird question.</p>
  
  <p>The thing is, I have two similar classes, both using a @Resource instance of the same class. One of the classes runs fine but the other one gets a NullPointerException for the instance variable in question. And I can't see how this is. So if you know a way to "back-track" in the Eclipse debugger to see "how old" and where a value in a variable is set I would greatly appreciate it!</p>
  
  <p>And if there's no such feature for some obvious reason and this question in stupid I apologize in advance...</p>