title: how to set JCheckBox to have a check mark, or not within a program
body: <p>I am using a single <code>JCheckBox</code> as an un-editable indicator for when something happens in my program. Right now I have this:</p>
  
  <pre><code>public void update(Observable o, Object arg) {
      try {
  
          if (Controller.c.turn.equals(this)) {
              tp.turnCheckBox.setBorderPainted(true);
          }
          else {
              tp.turnCheckBox.setBorderPainted(false);
          }
      } catch (Exception e) {
      }
  </code></pre>
  
  <p>Basically, instead of painting the <code>turnCheckBox</code> border... I want to have a checkmark in it.
  It seems like it would be a simple pre-made method, maybe I am missing something but I can't get it to happen.</p>