package com.enterprisej2me.iFeedBack.midp.MVC;import java.io.*;import javax.microedition.midlet.*;import javax.microedition.lcdui.*;import javax.microedition.rms.*;import com.enterprisej2me.iFeedBack.midp.Task.*;import com.enterprisej2me.iFeedBack.midp.*;public class MainMenu extends MVCComponent {    private static Displayable screen = null;   private static Command exitCommand;  private static Command selectCommand;  private static Command doneCommand;  // The calling mdlet. Set from outsdie  public static Start m;  public MainMenu () {   }  public Displayable getScreen () {    return screen;  }  public void commandAction(Command c, Displayable s) {    try {      if (c == exitCommand) {        m.destroyApp(false);        m.notifyDestroyed();      } else if (c == doneCommand) {        showScreen();      } else if (c == List.SELECT_COMMAND ||                 c == selectCommand ) {        if (((List) screen).getSelectedIndex() == 0) {          (new ChooseCourse()).showScreen();        } else if (((List) screen).getSelectedIndex() == 1) {          (new UpdateToken()).showScreen();        } else if (((List) screen).getSelectedIndex() == 2) {          (new AddCourse()).showScreen();        } else if (((List) screen).getSelectedIndex() == 3) {          SubmitAllTask t = new SubmitAllTask( display );          t.go();        } else if (((List) screen).getSelectedIndex() == 4) {          UpdateToken.clearAll ();          ChooseCourse.clearAll ();          RecordStore rs;          RecordEnumeration re;          rs = RecordStore.openRecordStore("answer", true);          re = rs.enumerateRecords(null, null, false);          while ( re.hasNextElement() ) {            int id = re.nextRecordId ();            rs.deleteRecord( id );          }          re.destroy();          rs.closeRecordStore();          Alert a = new Alert("Cache cleared");          a.setTimeout(Alert.FOREVER);          display.setCurrent(a);        } else if (((List) screen).getSelectedIndex() == 5) {          String helpStr;          Class clazz = this.getClass();          InputStream is = clazz.getResourceAsStream("/help.txt");          ByteArrayOutputStream bos = new ByteArrayOutputStream ();          byte [] buf = new byte [256];          while (true) {            int rd = is.read (buf, 0, 256);            if (rd == -1) break;            bos.write (buf, 0, rd);          }          buf = bos.toByteArray ();          helpStr = new String(buf);          bos.close();          is.close();           Form form = new Form("Help");          form.append( helpStr );          form.addCommand(doneCommand);          form.setCommandListener( (CommandListener) this);          display.setCurrent( form );        }      }    } catch (Exception e) {      e.printStackTrace();      Alert a = new Alert("Error in the Main Menu");      a.setTimeout(Alert.FOREVER);      display.setCurrent(a);    }  }  protected void initModel() throws Exception {    // nothing to do here  }  protected void createView() throws Exception {    // static member, only init once    exitCommand = new Command("EXIT", Command.SCREEN, 2);    selectCommand = new Command("SELECT", Command.SCREEN, 1);    doneCommand = new Command("DONE", Command.SCREEN, 1);    screen = new List("Menu", List.IMPLICIT);    ((List) screen).append("Choose Course", null);    ((List) screen).append("Update Token", null);    ((List) screen).append("Add Course", null);    ((List) screen).append("Submit Answers", null);    ((List) screen).append("Erase Cache", null);    ((List) screen).append("Help", null);    screen.addCommand( exitCommand );    screen.addCommand( selectCommand );  }  protected void updateView() throws Exception {    // nothing to do here  }}