j-j2me-8-4.shtml

这是一本介绍J2ME 编程的书籍,里面有具体的实现过程讲解,是很好的入门书籍

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     // --></script><a href="#navskip"><img border="0" alt="跳至主目录" src="../i/c.gif" width="1" height="1"></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：循序渐进" width="500" height="40"></td>
  <td width="*" valign="bottom" align="right"><a border="0" href="../tutorial.zip"><img alt="下载教程 zip 文件" border="0" src="../i/icon-zip.gif" width="38" height="26"></a><a href=../tutorial_eng/index.shtml target=_blank><img alt="英文原文" border="0" src="../i/icon-source.gif" width="43" height="26"></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="主菜单" border="0" src="../i/main.gif" name="topmain" width="77" height="15"></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="index8.shtml"><img alt="章节菜单" border="0" src="../i/section.gif" name="topsection" width="98" height="15"></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="给出此教程的反馈意见" border="0" src="../i/feedback.gif" name="topfeedback" width="80" height="15"></a></TD><TD width="100%" background="../i/sw-gold.gif"><img src="../i/c.gif" width="1" height="1"></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-8-3.shtml"><img alt="上一屏" border="0" src="../i/previous.gif" name="topprevious" width="77" height="15"></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-8-5.shtml"><img alt="下一屏" border="0" src="../i/next.gif" name="topnext" width="60" height="15"></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/titlebar8.jpg" alt="第八章：使用 KJava GUI 组件的开发"></td></tr><tr><td bgcolor="ffffff" width="15">&nbsp;</td><td bgcolor="ffffff" width="12">&nbsp;</td><td valign="top" align="left" bgcolor="ffffff" width="*"><p><br x="7"><table cellspacing="0" cellpadding="0" border="0"><tr><td width="90%"><b><font size="4" face="Verdana, Arial, Helvetica">HelloWorld --  
              完整的代码清单</font></b></td><td width="200" align="right"><nobr><font size="1" face="Verdana, Arial, Helvetica">第 4 页（共 6 页）</font></nobr></td></tr></table><br x="7"><br x="7"><font size="2" face="Verdana, Arial, Helvetica"><p> 
        以下便是 Palm 设备的 HelloWorld 应用程序的完整代码示例:
</p><pre><code style="font-family: Courier New, Courier, monospace; font-size: 12">
      import com.sun.kjava.Button;
      import com.sun.kjava.Graphics;
      import com.sun.kjava.Spotlet;

      /**
       * Simple demonstration, "Hello World" program. Note that Spotlet is
       * the class that provides callbacks for event handling.
       */
      public class HelloWorld extends Spotlet
      {
         /** Stores a reference to the "Exit" button. */
         private static Button exitButton;

         /**
          * Main entry point for this program.
          */
         public static void main(String[] args)
         {
            (new HelloWorld()).register(NO_EVENT_OPTIONS);
         }

         /**
          * Constructor: draws the screen.
          */
         public HelloWorld()
         {
            // Create (initially invisible) the "Exit" button
            exitButton = new Button("Exit",70,145);

            // Get a reference to the graphics object;
            // i.e. the drawable screen
            Graphics g = Graphics.getGraphics();
            g.clearScreen();

            // Draw the text, "Hello World!" somewhere near the center
            g.drawString("Hello World!", 55, 45, g.PLAIN);

            // Draw the "Exit" button
            exitButton.paint();
         }

         /**
          * Handle a pen down event.
          */
         public void penDown(int x, int y)
         {
            // If the "Exit" button was pressed, end this application
            if (exitButton.pressed(x,y))
              System.exit(0);
         }
      }
</code></pre><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="主菜单" border="0" src="../i/main.gif" name="bottommain" width="77" height="15"></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="index8.shtml"><img alt="章节菜单" border="0" src="../i/section.gif" name="bottomsection" width="98" height="15"></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="给出此教程的反馈意见" border="0" src="../i/feedback.gif" name="bottomfeedback" width="80" height="15"></a></TD><TD width="100%" background="../i/sw-gold.gif"><img src="../i/c.gif" width="1" height="1"></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-8-3.shtml"><img alt="上一屏" border="0" src="../i/previous.gif" name="bottomprevious" width="77" height="15"></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-8-5.shtml"><img alt="下一屏" border="0" src="../i/next.gif" name="bottomnext" width="60" height="15"></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>