title: Java override class to Load project Class instead Jar class
body: <p>I have a jar that contain a class that I would like to modify. For some reason I do not want to re-compile and update the Jar. So what I do is I recreate a full qualified name for that class in my project, and place my code in it, but I do not have an idea how to ensure JVM loaded my project class and not the Jar class.
  I have look through some post but they are about how to load a Jar class into project, not the other way round.</p>