title: jComoBox input only characters (no numbers)
body: <p>I'm trying to make a jComoBox that allows all input except from digits. But when i'm trying it with jComoBox it's not working.</p>
  
  <p>I did it successfully with jTextFiled(but the oppsite- no numbers):</p>
  
  <p>Code of TimeKeyTyped event for i_borow jTextFiled:</p>
  
  <pre><code>private void i_borowTimeKeyTyped(java.awt.event.KeyEvent evt) {                                     
      char c = evt.getKeyChar();
      if(!( Character.isDigit(c) || c == KeyEvent.VK_BACK_SPACE || c == KeyEvent.VK_DELETE)) {
          evt.consume();
          l_msg2.setForeground(Color.red);
      } else {
          l_msg2.setForeground(Color.black);
      }
  }
  </code></pre>
  
  <p>I tried to do the same to the jComoBox (c_title):</p>
  
  <pre><code>private void c_titleKeyTyped(java.awt.event.KeyEvent evt) {                                 
      System.out.println("ssss");
      char c = evt.getKeyChar();
      System.out.println(c);
      if(Character.isDigit(c)){
          evt.consume();
          l_noNum.setForeground(Color.red);
      } else {
          l_noNum.setForeground(Color.black);
      }
  } 
  </code></pre>
  
  <p>The code doesn't work.
  Moreover, that's not printing the "ssss" string.
  Why it's not working on jComboBox?
  thanks.</p>