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var emailAbstract="在本教程中，您將要使用 Java 2 平臺，Micro 版 (Java 2 Platform, Micro Edition, J2ME) -- Sun Microsystem 的 Java 2 平臺最新版本為手持計算機開發一個基本繪圖應用程序。我們將首先說明 J2ME 的背景，研究 J2ME 配置和簡表，然后指導您建立自己的開發環境。 接著，我們將研究 K 虛擬機 GUI 開發，使用連接限制設備配置 (Connected Limited Device Configuration, CLDC) API 開發一個基本繪圖應用程序。我們還將討論移動信息設備簡表 (Mobile Information Device, MIDP) 用戶界面開發，這種開發也要用到 CLDC。最后，我們將簡單討論一下連接設備配置 (Connected Device Configuration, CDC)，但我們不開發一個簡單的應用程序，因為 CDC 主要面向大型設備。";
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var menu2blurb="J2ME 概述";
var menu3blurb="開發 J2ME 應用程序";
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var menu5blurb="J2ME 簡表";
var menu6blurb="設置您的開發環境";
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var menu8blurb="使用 KJava GUI 組件的開發";
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// --></script><a href="#navskip"><img border="0" alt="跳至主目錄" src="../i/c.gif"></a><!--#include virtual="/developerWorks/inc/tuto-inc/tuto-header.inc" --><!--#include virtual="/developerWorks/inc/tuto-inc/tuto-java-header.inc" --><br x="7"><img src="imagemaster/masthead.jpg" alt="J2ME：循序漸進"></td>
<td width="*" valign="bottom" align="right"><a border="0" href="../tutorial.zip"><img alt="下載教程 zip 文件" border="0" src="../i/icon-zip.gif"></a><a href=../tutorial_eng/index.shtml target=_blank><img alt="英文原文" border="0" src="../i/icon-source.gif"></a></td></tr><tr><td height="2" colspan="2"><img height="2" width="1" src="../i/c.gif"></td></tr></table><TABLE border="0" cellpadding="0" cellspacing="0" width="100%"><TR><TD width="150" height="1" bgcolor="#000000" colspan="6"><IMG alt="" height="1" width="150" src="../i/c.gif"></TD></TR><TR><TD background="../i/sw-gold.gif"><a border="0" href="index.shtml" onMouseOver="iOver('topmain'); iOver('bottommain'); self.status=mainblurb; return true;" onMouseOut="iOut('topmain'); iOut('bottommain'); self.status=''; return true;"><img alt="主菜單" border="0" src="../i/main.gif" name="topmain"></a></TD><TD background="../i/sw-gold.gif"><a border="0" onMouseOver="iOver('topsection'); iOver('bottomsection'); self.status=sectionblurb; return true;" onMouseOut="iOut('topsection'); iOut('bottomsection'); self.status=''; return true;" href="index10.shtml"><img alt="章節菜單" border="0" src="../i/section.gif" name="topsection"></a></TD><TD background="../i/sw-gold.gif"><a border="0" onMouseOver="iOver('topfeedback'); iOver('bottomfeedback'); self.status=feedbackblurb; return true;" onMouseOut="iOut('topfeedback'); iOut('bottomfeedback'); self.status=''; return true;" href="j-j2me-12-3.shtml"><img alt="給出此教程的反饋意見" border="0" src="../i/feedback.gif" name="topfeedback"></a></TD><TD width="100%" background="../i/sw-gold.gif"><img src="../i/c.gif"></TD><TD background="../i/sw-gold.gif"><a border="0" onMouseOver="iOver('topprevious'); iOver('bottomprevious'); self.status=previousblurb; return true;" onMouseOut="iOut('topprevious'); iOut('bottomprevious'); self.status=''; return true;" href="j-j2me-10-2.shtml"><img alt="上一屏" border="0" src="../i/previous.gif" name="topprevious"></a></TD><TD background="../i/sw-gold.gif"><a border="0" onMouseOver="iOver('topnext'); iOver('bottomnext'); self.status=nextblurb; return true;" onMouseOut="iOut('topnext'); iOut('bottomnext'); self.status=''; return true;" href="j-j2me-10-4.shtml"><img alt="下一屏" border="0" src="../i/next.gif" name="topnext"></a></TD></TR></TABLE><table bgcolor="ffffff" cellspacing="0" cellpadding="2" border="0" height="400" width="100%"><tr valign="bottom"><a name="navskip"></a><td height="25" colspan="4"><img border="0" height="25" width="562" src="imagemaster/titlebar10.jpg" alt="第十章：MIDP API"></td></tr><tr><td bgcolor="ffffff" width="15"> </td><td bgcolor="ffffff" width="12"> </td><td valign="top" align="left" bgcolor="ffffff" width="*"><p><br x="7"><table cellspacing="0" cellpadding="0" border="0"><tr><td width="90%"><font size="4" face="Verdana, Arial, Helvetica"><b>MIDP API</b></font></td><td width="200" align="right"><nobr><font size="1" face="Verdana, Arial, Helvetica">第 3 頁（共 6 頁）</font></nobr></td></tr></table><br x="7"><br x="7"><font size="2" face="Verdana, Arial, Helvetica"><p>MIDP 包含四個核心 CLDC 軟件包 (<code style="font-family: Courier New, Courier, monospace; font-size: 12">java.lang</code>、<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.util</code> 和 <code style="font-family: Courier New, Courier, monospace; font-size: 12">javax.microedition.io</code>)，另加下面的三個特定于 MIDP 的軟件包：
</p><font size="2" face="Verdana, Arial, Helvetica"><ul><li><code style="font-family: Courier New, Courier, monospace; font-size: 12">javax.microedition.lcdui</code></li><li><code style="font-family: Courier New, Courier, monospace; font-size: 12">javax.microedition.midlet</code></li><li><code style="font-family: Courier New, Courier, monospace; font-size: 12">javax.microedition.rms</code></li></ul><p> 我們將在本章的后面部分詳細介紹特定于 MIDP 軟件包。除了上面新的軟件包之外，MIDP 還向核心 CLDC 軟件包添加了四個新類，如下所示。</font>
</p><ul><li><code style="font-family: Courier New, Courier, monospace; font-size: 12">java.util.Timer</code> --
用于為后臺線程中將來要執行的任務確定時間。<br x="7"><br x="7"></li><li><code style="font-family: Courier New, Courier, monospace; font-size: 12">java.util.TimerTask</code> --
被
<code style="font-family: Courier New, Courier, monospace; font-size: 12">java.util.Timer
</code>類使用，用來為后臺線程中稍后的執行定義任務。<br x="7"><br x="7"><li><code style="font-family: Courier New, Courier, monospace; font-size: 12">javax.microedition.io.HttpConnection</code> --
一個接口，為 HTTP
連接定義必要的方法和常量。<br x="7"><br x="7"><li>java.lang.IllegalStateException -- 一個 <code style="font-family: Courier New, Courier, monospace; font-size: 12">RuntimeException</code>， 指出在不合法或不合適的時間已經調用的一個方法。</ul><br x="7"></font></td></tr></table><TABLE border="0" cellpadding="0" cellspacing="0" width="100%"><TR><TD background="../i/sw-gold.gif"><a border="0" href="index.shtml" onMouseOver="iOver('topmain'); iOver('bottommain'); self.status=mainblurb; return true;" onMouseOut="iOut('topmain'); iOut('bottommain'); self.status=''; return true;"><img alt="主菜單" border="0" src="../i/main.gif" name="bottommain"></a></TD><TD background="../i/sw-gold.gif"><a border="0" onMouseOver="iOver('topsection'); iOver('bottomsection'); self.status=sectionblurb; return true;" onMouseOut="iOut('topsection'); iOut('bottomsection'); self.status=''; return true;" href="index10.shtml"><img alt="章節菜單" border="0" src="../i/section.gif" name="bottomsection"></a></TD><TD background="../i/sw-gold.gif"><a border="0" onMouseOver="iOver('topfeedback'); iOver('bottomfeedback'); self.status=feedbackblurb; return true;" onMouseOut="iOut('topfeedback'); iOut('bottomfeedback'); self.status=''; return true;" href="j-j2me-12-3.shtml"><img alt="給出此教程的反饋意見" border="0" src="../i/feedback.gif" name="bottomfeedback"></a></TD><TD width="100%" background="../i/sw-gold.gif"><img src="../i/c.gif"></TD><TD background="../i/sw-gold.gif"><a border="0" onMouseOver="iOver('topprevious'); iOver('bottomprevious'); self.status=previousblurb; return true;" onMouseOut="iOut('topprevious'); iOut('bottomprevious'); self.status=''; return true;" href="j-j2me-10-2.shtml"><img alt="上一屏" border="0" src="../i/previous.gif" name="bottomprevious"></a></TD><TD background="../i/sw-gold.gif"><a border="0" onMouseOver="iOver('topnext'); iOver('bottomnext'); self.status=nextblurb; return true;" onMouseOut="iOut('topnext'); iOut('bottomnext'); self.status=''; return true;" href="j-j2me-10-4.shtml"><img alt="下一屏" border="0" src="../i/next.gif" name="bottomnext"></a></TD></TR><TR><TD width="150" height="1" bgcolor="#000000" colspan="6"><IMG alt="" height="1" width="150" src="../i/c.gif"></TD></TR></TABLE><!--#include virtual="/developerWorks/inc/tuto-inc/tuto-footer.inc" --></body></html>?? 快捷鍵說明
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