title: how to fill a second combobox
body: <p>How to fill a second combo for Turkey?
  When selecting the first combo turkey,    Ankara  Izmir filled  to second combo.</p>
  
  <pre><code>String[] s = {"Turkey", "Rusia", "Italia"};
          for (String string : s) {
              comboBox.addItem(string);
          }
          String x = String.valueOf(comboBox.getSelectedItem());
          if (x.equalsIgnoreCase("Turkey")) {
              String[] s1 = {"Ankara", "Izmir"};
              for (String ss : s1) {
                  comboBox1.addItem(ss);
              }
          } 
  </code></pre>