title: How to fix Naked notify warning of FindBugs?
body: <p>I have Naked notify warning of FindBugs. 
  The below is my code.</p>
  
  <pre><code>synchronized (this) {
          this.notify();
      }
  </code></pre>
  
  <p>The "this" is "public class Controller extends Thread".
  How to fix the warning?? I have no idea for it.</p>
  
  <p>Thanks in advance.</p>