Memperoleh nilai properti MIDlet pada JAVA (J2ME)

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class PropertiMIDlet extends MIDlet
  implements CommandListener {
   
  private Display display;
  private Form form;
  private StringBuffer sb;

  private final Command cmdKeluar =
    new Command("Keluar", Command.EXIT, 1);
 
  public PropertiMIDlet() {
    display = Display.getDisplay(this);
   
    form = new Form("Properti MIDlet");
       
    form.addCommand(cmdKeluar);
    form.setCommandListener(this);   
  }
   
  public void startApp() {
    sb = getAppProperties();
    StringItem si = new StringItem(null, sb.toString());
    form.append(si);
    display.setCurrent(form);
  }
   
  public void pauseApp() {
  }
   
  public void destroyApp(boolean unconditional) {
  }
   
  public void commandAction(Command c, Displayable s) {
    if (c == cmdKeluar) {
      destroyApp(false);
      notifyDestroyed();
    }   
  }
 
  private StringBuffer getAppProperties() {
    StringBuffer temp = new StringBuffer();
    temp.append("Nama MIDlet: " +
        getAppProperty("MIDlet-Name"));
    temp.append("\nVersi: " +
        getAppProperty("MIDlet-Version"));
    temp.append("\nVendor: " +
        getAppProperty("MIDlet-Vendor"));
    temp.append("\nUkuran: " +
        getAppProperty("MIDlet-Jar-Size"));
    temp.append("\nURL: " +
        getAppProperty("MIDlet-Jar-URL"));
    return temp;
  }
}