?? keyevents.html
字號(hào):
<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<TITLE>Handling Key Presses
(Java Developers Almanac Example)
</TITLE>
<META CONTENT="Patrick Chan" NAME="AUTHOR">
<META CONTENT="Code Examples from The Java Developers Almanac 1.4" NAME="DESCRIPTION">
<META CONTENT="Addison-Wesley/Patrick Chan" NAME="OWNER">
<META CONTENT="3/20/02" NAME="revision">
<STYLE TYPE="text/css">
<!-- BODY CODE {font-family: Courier, Monospace; font-size: 11pt} TABLE, BODY {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10pt} PRE {font-family: Courier, Monospace; font-size: 10pt} H3 {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 11pt} A.eglink {text-decoration: none} A:hover.eglink {text-decoration: underline} -->
</STYLE>
</HEAD>
<BODY>
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD rowspan="3"><A HREF="/?l=ex"><IMG BORDER="0" ALIGN="BOTTOM" HSPACE="10" SRC="/egs/almanac14a.jpg"></A></TD><TD VALIGN="top"><font face="Times" size="6"><b>The Java Developers Almanac 1.4</b></font>
Order this book from <a href="/cgi-bin/scripts/redirect.pl?l=ex&url=http://www.amazon.com/exec/obidos/ASIN/0201752808/xeo">Amazon</a>.
</TD>
</TR>
<TR>
<TD align="right" valign="bottom">
<FORM method="get" action="/cgi-bin/search/find.pl">
<INPUT size="25" name="words" type="text"><INPUT value="Search" type="submit">
</FORM>
</TD>
</TR>
</TABLE>
<HR color="#6666cc">
<DIV ALIGN="LEFT">
<A HREF="/">Home</A>
>
<A HREF="../index.html">List of Packages</A>
>
<B><A HREF="../java.awt.event/pkg.html">java.awt.event</A></B><font color="#666666" SIZE="-2">
[8 examples]
</font>
</DIV><P>
<h3>
e649.
Handling Key Presses</h3>
You can get the key that was pressed either as a key character
(which is a Unicode character) or as a key code (a special value
representing a particular key on the keyboard).
<pre>
<font color="#0066ff"><i>component</i></font>.addKeyListener(new MyKeyListener());
public class MyKeyListener extends KeyAdapter {
public void keyPressed(KeyEvent evt) {
// Check for key characters.
if (evt.getKeyChar() == <font color="#0066ff"><i>'a'</i></font>) {
<font color="#0066ff"><i>process</i></font>(evt.getKeyChar());
}
// Check for key codes.
if (evt.getKeyCode() == KeyEvent.<font color="#0066ff"><i>VK_HOME</i></font>) {
<font color="#0066ff"><i>process</i></font>(evt.getKeyCode());
}
}
}
</pre>
<P><table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td bgcolor="#6666cc" align="center"><font color="#ffffff">
Related Examples
</font></td>
</tr>
</table>
e647. <a class="eglink" href="InnerHandler.html?l=rel">
Handling Events with an Anonymous Class
</a>
<br>
e648. <a class="eglink" href="ActionEvents.html?l=rel">
Handling Action Events
</a>
<br>
e650. <a class="eglink" href="MouseEvents.html?l=rel">
Handling Mouse Clicks
</a>
<br>
e651. <a class="eglink" href="MouseMotion.html?l=rel">
Handling Mouse Motion
</a>
<br>
e652. <a class="eglink" href="MultiClicks.html?l=rel">
Detecting Double and Triple Clicks
</a>
<br>
e653. <a class="eglink" href="FocusEvents.html?l=rel">
Handling Focus Changes
</a>
<br>
e654. <a class="eglink" href="ItemEvents.html?l=rel">
Firing Item Events
</a>
<br>
<br>
<br>
<FONT FACE="Verdana, Arial, Helvetica, sans-serif" SIZE="0">
© 2002 Addison-Wesley.
</FONT>
</BODY>
</HTML>
?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號(hào)
Ctrl + =
減小字號(hào)
Ctrl + -