📄 list_listgetsel.htm
字号:
<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<TITLE>Getting the Selected Items in a JList Component (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">
<META CONTENT="no-cache" HTTP-EQUIV="Pragma">
<LINK href="/almanac.css" media="screen" type="text/css" rel="stylesheet">
</HEAD>
<BODY>
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD></TD>
</TR>
</TABLE>
<br>
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD></TD>
</TR>
<TR>
<TD rowspan="3"><A HREF="/?l=ex"><IMG BORDER="0" ALIGN="BOTTOM" HSPACE="10" SRC="/egs/almanac14a.jpg"></A></TD><TD VALIGN="top">
<h1>The Java Developers Almanac 1.4</h1>
<br>
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">
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD valign="top"><script type="text/javascript">
<!--
google_ad_client = "pub-6001183370374757";
google_ad_width = 120;
google_ad_height = 600;
google_ad_format = "120x600_as";
google_ad_channel = "4777242811";
google_ad_type = "text_image";
google_color_border = "FFFFFF";
google_color_bg = "FFFFFF";
google_color_link = "6666CC";
google_color_url = "6666CC";
google_color_text = "000000";
//--></script><script src="http://pagead2.googlesyndication.com/pagead/show_ads.js" type="text/javascript"></script></TD><TD> </TD><TD valign="top">
<DIV ALIGN="LEFT">
<A HREF="/">Home</A>
>
<A HREF="../index.html">List of Packages</A>
>
<A HREF="../javax.swing/pkg.html">javax.swing</A><font color="#666666" class="xsmall-font">
[141 examples]
</font>
>
<B><A HREF="../javax.swing/pkg.html#JList">JList</A></B><font color="#666666" class="xsmall-font">
[12 examples]
</font>
</DIV><P>
<h3>e779. Getting the Selected Items in a JList Component</h3>
The following methods return the indices of the selected items:
<pre> // To create a list, see <a href="../javax.swing/list_List.html" class="eglink"><b>e774</b> Creating a JList Component</a>
// Get the index of all the selected items
int[] selectedIx = <font color="#0066ff"><i>list</i></font>.getSelectedIndices();
// Get all the selected items using the indices
for (int i=0; i<selectedIx.length; i++) {
Object sel = <font color="#0066ff"><i>list</i></font>.getModel().getElementAt(selectedIx[i]);
}
// Get the index of the first selected item
int firstSelIx = <font color="#0066ff"><i>list</i></font>.getSelectedIndex();
// Get the index of the last selected item
int lastSelIx = <font color="#0066ff"><i>list</i></font>.getMaxSelectionIndex();
// Determine if the third item is selected
int index = <font color="#0066ff"><i>2</i></font>;
boolean isSel = <font color="#0066ff"><i>list</i></font>.isSelectedIndex(index);
// Determine if there are any selected items
boolean anySelected = !<font color="#0066ff"><i>list</i></font>.isSelectionEmpty();
</pre>
The following methods return the selected item objects:
<pre> // Get the first selected item
Object firstSel = <font color="#0066ff"><i>list</i></font>.getSelectedValue();
// Get all selected items without using indices
Object[] selected = <font color="#0066ff"><i>list</i></font>.getSelectedValues();
</pre>
<P><table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td bgcolor="#6666cc" align="center"><font color="#ffffff">
<b>Related Examples</b></font></td>
</tr>
</table>
e774. <a class="eglink" href="list_List.html?l=rel">
Creating a JList Component
</a>
<br>
e775. <a class="eglink" href="list_ListSetDim.html?l=rel">
Setting the Dimensions of an Item in a JList Component
</a>
<br>
e776. <a class="eglink" href="list_ListTt.html?l=rel">
Setting a Tool Tip for an Item in a JList Component
</a>
<br>
e777. <a class="eglink" href="list_ListGetItem.html?l=rel">
Getting the Items in a JList Component
</a>
<br>
e778. <a class="eglink" href="list_ListAddRem.html?l=rel">
Adding and Removing an Item in a JList Component
</a>
<br>
e780. <a class="eglink" href="list_ListSel.html?l=rel">
Setting the Selected Items in a JList Component
</a>
<br>
e781. <a class="eglink" href="list_ListSelMode.html?l=rel">
Setting the Selection Mode of a JList Component
</a>
<br>
e782. <a class="eglink" href="list_ListLayout.html?l=rel">
Arranging Items in a JList Component
</a>
<br>
e783. <a class="eglink" href="list_ListDblClick.html?l=rel">
Detecting Double and Triple Clicks on an Item in a JList Component
</a>
<br>
e784. <a class="eglink" href="list_ListSelEvt.html?l=rel">
Listening for Changes to the Selection in a JList Component
</a>
<br>
e785. <a class="eglink" href="list_ListChgEvt.html?l=rel">
Listening for Changes to the Items in a JList Component
</a>
<br>
<table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td align="left">
<br>
See also:
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#Actions">
Actions
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JButton">
JButton
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JCheckBox">
JCheckBox
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JComboBox">
JComboBox
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JDesktop%20and%20JInternalFrame">
JDesktop and JInternalFrame
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JFrame,%20JWindow,%20JDialog">
JFrame, JWindow, JDialog
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JLabel">
JLabel
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JProgressBar">
JProgressBar
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JRadioButton">
JRadioButton
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JScrollPane">
JScrollPane
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JSlider">
JSlider
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JSpinner">
JSpinner
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JSplitPane">
JSplitPane
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JTabbedPane">
JTabbedPane
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#JToolBar">
JToolBar
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#Keystrokes%20and%20Input%20Maps">
Keystrokes and Input Maps
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#Layout">
Layout
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#Look%20and%20Feel">
Look and Feel
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#Menus">
Menus
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#Progress%20Monitor">
Progress Monitor
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#The%20Screen">
The Screen
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#Tool%20Tips">
Tool Tips
</a>
<a class="eglink" href="/egs/javax.swing/pkg.html?l=rel#UI%20Default%20Values">
UI Default Values
</a>
</td>
</tr>
</table>
<br>
<br>
<FONT class="xsmall-font">
© 2002 Addison-Wesley.
</FONT></TD><TD> </TD><TD valign="top"><A href="http://compositesw.com/devzone?ref=javaalmanac"><IMG alt="Click Here" height="600" width="120" border="0" src="/csw_oad_120x600_final.gif"></A></TD>
</TR>
</TABLE>
</BODY>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<META CONTENT="NO-CACHE" HTTP-EQUIV="PRAGMA">
</HEAD>
</HTML>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -