import java.util.Enumeration;
import java.util.ResourceBundle;
import java.util.StringTokenizer;

public class SimpleResourceBundle extends ResourceBundle {

  private String keys = "AMMessage PMMessage";

  public Object handleGetObject(String key) {
    if (key.equals("AMMessage")) return "Good morning";
    if (key.equals("PMMessage")) return "Good evening";

    return null;
  }

  public Enumeration getKeys() {
    StringTokenizer keyTokenizer = new StringTokenizer(keys);

    return keyTokenizer;
  }
}