import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class HideText extends MIDlet implements CommandListener
{
  private Display display;
  private Form form; 
  private Command submit; 
  private Command exit; 
  private TextField textfield; 
  public HideText()
  {
   display = Display.getDisplay(this);
   submit = new Command("Submit", Command.SCREEN, 1);
   exit = new Command("Exit", Command.EXIT, 1);
   textfield = new TextField("Password:", "", 30, TextField.ANY | TextField.PASSWORD);
   form = new Form("Enter Password");    
   form.addCommand(exit);
   form.addCommand(submit);    
   form.append(textfield);
   form.setCommandListener(this);   
  }
  public void startApp()
  {
   display.setCurrent(form);
  }
  public void pauseApp()
  { 
  }
  public void destroyApp(boolean unconditional)
  { 
  }
  public void commandAction(Command command, Displayable displayable)
  {
   if (command == submit)
   {
     textfield.setConstraints(TextField.ANY);
     textfield.setString("Thank you.");
     form.removeCommand(submit);
   }
   else if (command == exit)
   {
      destroyApp(false);
      notifyDestroyed();
   }
  }
}