// This package defines MIDP applications and the interactions
// between the application and the environment in which the
// application runs.
import  javax.microedition.midlet.*;

// This package provides a set of features for implementation
// of user interfaces.
import  javax.microedition.lcdui.*;

public class  HelloMIDlet
    extends  MIDlet 
    implements  CommandListener {

  private Display  display;
  private TextBox  tbxMain;
  private Command  cmdExit;

  // MIDlet constructor
  public  HelloMIDlet( ) {
    display = Display.getDisplay( this );
    cmdExit = new Command( "Exit", Command.SCREEN, 1 );

    tbxMain = new TextBox( "HelloMIDlet", "Hello, World!", 50, 0 );
    tbxMain.addCommand( cmdExit );
    tbxMain.setCommandListener( this );
  }
  
  // Called by application manager to start the MIDlet
  public void  startApp( ) {
    display.setCurrent( tbxMain );
  }
  
  // A required method
  public void  pauseApp( ) { }
  
  // A required method
  public void  destroyApp( boolean unconditional ) { }
  
  // Destroy the MIDlet if the Exit command was selected.
  public void  commandAction( Command c, Displayable s ) {
    if ( c == cmdExit ) {
      destroyApp( false );
      notifyDestroyed( );
    }
  }
}