If KeyStroke.getKeyStroke(String) is passed an empty string, a NoSuchElementException will be thrown by StringTokenizer.nextToken(). The getKeyStroke method wrongly assumes that null will be returned if there aren't any tokens.

Here's the test case:

   import javax.swing.KeyStroke;

   public class KeyStrokeTest {
        public static void main(String[] args) {
            KeyStroke ks = KeyStroke.getKeyStroke("");
        }
   }