hello.java

Creat mobile game Creat mobile game Creat mobile game Creat mobile game

package net.frog_parrot.hello;

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

/**
 * This is the main class of the hello world demo.
 *
 * @author Carol Hamer
 */
public class Hello extends MIDlet implements CommandListener {

  /**
   * The canvas is the region of the screen that has been allotted 
   * to the game.
   */
  HelloCanvas myCanvas;

  /**
   * The Command objects appear as buttons in this example.
   */
  private Command exitCommand = new Command("Exit", Command.EXIT, 99);

  /**
   * The Command objects appear as buttons in this example.
   */
  private Command toggleCommand = new Command("Toggle Msg", Command.SCREEN, 1);

  /**
   * Initialize the canvas and the commands.
   */
  public Hello() {
    myCanvas = new HelloCanvas();
    myCanvas.addCommand(exitCommand);
    myCanvas.addCommand(toggleCommand);
    // we set one command listener to listen to all 
    // of the commands on the canvas:
    myCanvas.setCommandListener(this);
  }

  //----------------------------------------------------------------
  //  implementation of MIDlet

  /**
   * Start the application.
   */
  public void startApp() throws MIDletStateChangeException {
    // display my canvas on the screen:
    Display.getDisplay(this).setCurrent(myCanvas);
    myCanvas.repaint();
  }
  
  /**
   * If the MIDlet was using resources, it should release 
   * them in this method.
   */
  public void destroyApp(boolean unconditional) 
      throws MIDletStateChangeException {
  }

  /**
   * This method is called to notify the MIDlet to enter a paused 
   * state.  The MIDlet should use this opportunity to release 
   * shared resources.
   */
  public void pauseApp() {
  }

  //----------------------------------------------------------------
  //  implementation of CommandListener

  /*
   * Respond to a command issued on the Canvas.
   * (either reset or exit).
   */
  public void commandAction(Command c, Displayable s) {
    if(c == toggleCommand) {
      myCanvas.toggleHello();
    } else if(c == exitCommand) {
      try {
	destroyApp(false);
	notifyDestroyed();
      } catch (MIDletStateChangeException ex) {
      }
    }
  }
  
}