title: How to remove the sound played when focus is transferred to an uneditable JTextComponent
body: <p>How can I get rid of the sound when I give focus to an uneditable JTextField or JTextPane?</p>
  
  <p>Whenever I transfer focus to a JTextPane which is uneditable and hit Enter, a sound plays which is equals to the "beep" of the Toolkit class:</p>
  
  <pre><code>Toolkit.getDefaultToolkit.beet();
  </code></pre>
  
  <p>How can I make it play no sound?</p>