helloworld2.java

《精通JAVA手机游戏与应用程序设计》随书光盘

import javax.microedition.lcdui.*;

import javax.microedition.midlet.*;

/**
 * @author long
 */
public class HelloWorld2 extends MIDlet implements CommandListener {

	private Command exitCommand,backCommand,screenCommand1,screenCommand2;

	private TextBox tb;

	public HelloWorld2() {
		exitCommand = new Command("Exit", Command.EXIT, 1);
		backCommand = new Command("Back", Command.BACK, 1);
		screenCommand1 = new Command("Screen1", Command.SCREEN, 1);
		screenCommand2 = new Command("Screen2", Command.SCREEN, 1);
		tb = new TextBox("Hello MIDlet", "Hello,World!", 15, 0);
		
		tb.addCommand(backCommand);
		tb.addCommand(exitCommand);
		tb.addCommand(screenCommand1);
		tb.addCommand(screenCommand2);
		tb.setCommandListener(this);
		
	}


	protected void startApp() throws MIDletStateChangeException {
		Display.getDisplay(this).setCurrent(tb);
		System.out.println("startApp");

	}

	protected void pauseApp() {
		System.out.println("pauseApp");

	}

	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		System.out.println("destroyApp");

	}


	public void commandAction(Command c, Displayable d) {
		if (c == exitCommand) {
			try {
				destroyApp(false);
			} catch (MIDletStateChangeException exception) {
				System.out.println("MIDletStateChangeException");
			}
			notifyDestroyed();
		}

	}

}