title: What it means that associated with Class synchronization sentence in java specification
body: <p>In Java language spec, there is below sentence  </p>
  
  <blockquote>
    <p>A class method that is declared synchronized synchronizes on the monitor associated with the Class object of the class.</p>
  </blockquote>
  
  <p>I don't understand this sentence totally even I don't know what I don't know.  </p>
  
  <p>Could you let me know this sentence with some examples?  </p>
  
  <p>I appreciate you</p>