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var emailAbstract="在本教程中，您将要使用 Java 2 平台，Micro 版 (Java 2 Platform, Micro Edition, J2ME) -- Sun Microsystem 的 Java 2 平台最新版本为手持计算机开发一个基本绘图应用程序。我们将首先说明 J2ME 的背景，研究 J2ME 配置和简表，然后指导您建立自己的开发环境。 接着，我们将研究 K 虚拟机 GUI 开发，使用连接限制设备配置 (Connected Limited Device Configuration, CLDC) API 开发一个基本绘图应用程序。我们还将讨论移动信息设备简表 (Mobile Information Device, MIDP) 用户界面开发，这种开发也要用到 CLDC。最后，我们将简单讨论一下连接设备配置 (Connected Device Configuration, CDC)，但我们不开发一个简单的应用程序，因为 CDC 主要面向大型设备。";
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var menu2blurb="J2ME 概述";
var menu3blurb="开发 J2ME 应用程序";
var menu4blurb="J2ME 配置";
var menu5blurb="J2ME 简表";
var menu6blurb="设置您的开发环境";
var menu7blurb="CLDC API";
var menu8blurb="使用 KJava GUI 组件的开发";
var menu9blurb="使用 KJava 事件处理的开发";
var menu10blurb="MIDP API";
var menu11blurb="CDC API";
var menu12blurb="总结";
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要求</font></b></td><td width="200" align="right"><nobr><font size="1" face="Verdana, Arial, Helvetica">第 3 页（共 5 页）</font></nobr></td></tr></table><br x="7"><br x="7"><font size="2" face="Verdana, Arial, Helvetica"><p>CLDC 定义了下列要求：
</p><ul><li>完整的 Java
语言支持（除浮点支持、最终定案和错误处理之外）</li><li>完整的
JVM 支持</li><li>CLDC
的安全性</li><li>有限国际化的支持</li><li>继承类
-- 所有不针对 CLDC 的类都必须是 J2SE 1.3 类的子类</li><li>针对 CLDC 的类都在名为 <code style="font-family: Courier New, Courier, monospace; font-size: 12">javax.microedition
</code>的软件包和它的子包里</li></ul><p>除 <code style="font-family: Courier New, Courier, monospace; font-size: 12">javax.microedition</code>
软件包以外，CLDC API 还由 J2SE 的子集 <code style="font-family: Courier New, Courier, monospace; font-size: 12">java.io</code>，<code style="font-family: Courier New, Courier, monospace; font-size: 12">java.lang</code> 以及 <code style="font-family: Courier New, Courier, monospace; font-size: 12">java.util</code> 等软件包组成。我们将在 <a href="j-j2me-7-1.shtml">CLDC API</a> 这一章中学习有关的细节问题，然后使用 CLDC API 来开发我们的绘图应用程序。</font>
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