?? getgroupcur.html
字號:
<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<TITLE>Retrieving the Selected Button in a Group
(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">
<!-- CODE {font-family: Courier, Monospace; font-size: 12pt} PRE {font-family: Courier, Monospace; font-size: 11pt} BODY {font-size: 10pt} -->
</STYLE>
</HEAD>
<BODY>
<TR>
<TD></TD>
</TR>
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD><A HREF="/?l=ex"><IMG BORDER="0" ALIGN="BOTTOM" HSPACE="10" SRC="../almanac14a.jpg"></A></TD><TD VALIGN="MIDDLE">
<H1>The Java Developers Almanac 1.4</H1>
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>
</TABLE>
<HR>
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD><FONT FACE="Verdana, Arial, Helvetica, sans-serif">
<DIV ALIGN="LEFT">
<FONT FACE="Verdana, Arial, Helvetica, sans-serif" SIZE="3"><A HREF="../../index.html">Home</A>
:
<A HREF="../index.html">List of Packages</A>
:
<B><A HREF="../javax.swing/pkg.html">javax.swing</A></B><font color="#666666" SIZE="-1">
[ examples]
</font></FONT>
</DIV>
<P></P>
<h3>
e708.
Retrieving the Selected Button in a Group</h3>
When you ask a button group for the currently selected
button, it returns the selected button's model (rather
than the selected button itself).
Fortunately, the button group maintains the list of buttons
and so you can iterate over this list looking for one with
the same model.
<pre>
static AbstractButton getSelection(ButtonGroup group) {
for (Enumeration e=group.getElements(); e.hasMoreElements(); ) {
AbstractButton b = (AbstractButton)e.nextElement();
if (b.getModel() == group.getSelection()) {
return b;
}
}
return null;
}
</pre>
<P></P>
<FONT FACE="Verdana, Arial, Helvetica, sans-serif" SIZE="0">
© 2002 Addison-Wesley.
</FONT></FONT></TD>
</TR>
</TABLE>
<br>
<hr>
<FORM method="get" action="/cgi-bin/search/find.pl">
<table width="100%">
<tr>
<b>Search</b>:
<INPUT size="40" name="words" type="text"><INPUT value="Search" name="submit" type="submit">
</tr>
<tr>
<font size="-1">
(e.g. "cache", "parse xml dom", "java.lang.String", "java.lang.String.substring", "String.substring", "substring")
</font>
</tr>
</table>
</FORM>
</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
Ctrl + =
減小字號
Ctrl + -