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每一个J2ME程序必须继承? javax.microedition.midlet.MIDlet;

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J2ME程序生命周期是：

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构造

运行

销毁

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关于程序打包：右键-->J2ME-->create package 或者 create obfuscated pageage

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Form类:

Command类:

package com.hoocy;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Form;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

public class MIDlet1 extends MIDlet {

	/*BACK    CANCEL    EXIT  HELP  ITEM OK  SCREEN  STOP */
	private Form form = new Form("我是FORM的标题");
	private Command BACK = new Command("BACK", Command.BACK, 1);
	private Command CANCEL = new Command("CANCEL", Command.CANCEL, 1);
	private Command EXIT = new Command("EXIT", Command.EXIT, 1);
	private Command HELP = new Command("HELP", Command.HELP, 1);
	private Command ITEM = new Command("ITEM", Command.ITEM, 1);
	private Command OK = new Command("OK", Command.OK, 1);
	private Command SCREEN = new Command("SCREEN", Command.SCREEN, 1);
	private Command STOP = new Command("STOP", Command.STOP, 1);
	private Display display;
	 
	public MIDlet1() {
		//获得一个display实例
		display = Display.getDisplay(this);
		display.setCurrent(form);
		form.addCommand(BACK);
		form.addCommand(CANCEL);
		form.addCommand(EXIT);
		form.addCommand(HELP);
		form.addCommand(ITEM);
		form.addCommand(OK);
		form.addCommand(SCREEN);
		form.addCommand(STOP);
		System.out.println("构造函数");
	}

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

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

	protected void startApp() throws MIDletStateChangeException {
		System.out.println("startApp");
	}
}