A Swing JComboBox for Enums

Here is a quick and dirty combo box class I wrote the other day. It displays all of the values from a Java enum.

public class EnumCombo<E extends Enum<E>> extends JComboBox {
  private final Class<E> enumClass;

  public EnumCombo(Class<E> enumClass) {
    this.enumClass = enumClass;

    for (E e : enumClass.getEnumConstants()) {
      addItem(e);
    }
  }

  public E getSelectedItem() {
    return enumClass.cast(super.getSelectedItem());
  }
}

Using the combo box looks like this:

EnumCombo<Status> statusCombo = new EnumCombo<Status>(Status.class);

You’ll probably want to override toString() in the enum to display friendly values in the combo box.

Posted on Tuesday, February 10th, 2009 at 10:41 pm in Java.