What is a callback in java
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/824234/what-is-a-callback-function">What is a callback function?</a>  </p>
</blockquote>



<p>I have read the wikepedia definition of a call back but i still don't get it.Can anyone please explain to me what a callback is especially the line "In computer programming, a callback is a reference to executable code, or a piece of executable code, that is passed as an argument to other code. This allows a lower-level software layer to call a subroutine (or function) defined in a higher-level layer.".</p>
