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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Thu Apr 27 23:33:27 PDT 2000 --><TITLE>Java 2 Platform SE v1.3: Class ItemEvent</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/ItemEvent.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-files/index-1.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Std. Ed. v1.3</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../java/awt/event/InvocationEvent.html"><B>PREV CLASS</B></A> <A HREF="../../../java/awt/event/KeyAdapter.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="ItemEvent.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">java.awt.event</FONT><BR>Class ItemEvent</H2><PRE><A HREF="../../../java/lang/Object.html">java.lang.Object</A> | +--<A HREF="../../../java/util/EventObject.html">java.util.EventObject</A> | +--<A HREF="../../../java/awt/AWTEvent.html">java.awt.AWTEvent</A> | +--<B>java.awt.event.ItemEvent</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../java/io/Serializable.html">Serializable</A></DD></DL><HR><DL><DT>public class <B>ItemEvent</B><DT>extends <A HREF="../../../java/awt/AWTEvent.html">AWTEvent</A></DL><P>A semantic event which indicates that an item was selected or deselected. This high-level event is generated by an ItemSelectable object (such as a List) when an item is selected or de-selected. The event is passed to every <code>ItemListener</code> object which registered to receive such events using the component's <code>addItemListener</code> method. <P> The object that implements the <code>ItemListener</code> interface gets this <code>ItemEvent</code> when the event occurs. The listener is spared the details of processing individual mouse movements and mouse clicks, and can instead process a "meaningful" (semantic) event like "item selected" or "item deselected".<P><DL><DT><B>Since: </B><DD>1.1</DD><DT><B>See Also: </B><DD><A HREF="../../../java/awt/ItemSelectable.html"><CODE>ItemSelectable</CODE></A>, <A HREF="../../../java/awt/event/ItemListener.html"><CODE>ItemListener</CODE></A>, <a href="http://java.sun.com/docs/books/tutorial/post1.0/ui/itemlistener.html">Tutorial: Writing an Item Listener</a>, <a href="http://www.awl.com/cp/javaseries/jcl1_2.html">Reference: The Java Class Libraries (update file)</a>, <A HREF="../../../serialized-form.html#java.awt.event.ItemEvent">Serialized Form</A></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Field Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/event/ItemEvent.html#DESELECTED">DESELECTED</A></B></CODE><BR> This state-change-value indicates that a selected item was un-selected.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/event/ItemEvent.html#ITEM_FIRST">ITEM_FIRST</A></B></CODE><BR> The first number in the range of ids used for item events.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/event/ItemEvent.html#ITEM_LAST">ITEM_LAST</A></B></CODE><BR> The last number in the range of ids used for item events.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/event/ItemEvent.html#ITEM_STATE_CHANGED">ITEM_STATE_CHANGED</A></B></CODE><BR> This event id indicates that an item's state changed.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/event/ItemEvent.html#SELECTED">SELECTED</A></B></CODE><BR> This state-change value indicates that an item was selected.</TD></TR></TABLE> <A NAME="fields_inherited_from_class_java.awt.AWTEvent"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Fields inherited from class java.awt.<A HREF="../../../java/awt/AWTEvent.html">AWTEvent</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../java/awt/AWTEvent.html#ACTION_EVENT_MASK">ACTION_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#ADJUSTMENT_EVENT_MASK">ADJUSTMENT_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#COMPONENT_EVENT_MASK">COMPONENT_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#consumed">consumed</A>, <A HREF="../../../java/awt/AWTEvent.html#CONTAINER_EVENT_MASK">CONTAINER_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#FOCUS_EVENT_MASK">FOCUS_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#HIERARCHY_BOUNDS_EVENT_MASK">HIERARCHY_BOUNDS_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#HIERARCHY_EVENT_MASK">HIERARCHY_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#id">id</A>, <A HREF="../../../java/awt/AWTEvent.html#INPUT_METHOD_EVENT_MASK">INPUT_METHOD_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#INVOCATION_EVENT_MASK">INVOCATION_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#ITEM_EVENT_MASK">ITEM_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#KEY_EVENT_MASK">KEY_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#MOUSE_EVENT_MASK">MOUSE_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#MOUSE_MOTION_EVENT_MASK">MOUSE_MOTION_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#PAINT_EVENT_MASK">PAINT_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#RESERVED_ID_MAX">RESERVED_ID_MAX</A>, <A HREF="../../../java/awt/AWTEvent.html#TEXT_EVENT_MASK">TEXT_EVENT_MASK</A>, <A HREF="../../../java/awt/AWTEvent.html#WINDOW_EVENT_MASK">WINDOW_EVENT_MASK</A></CODE></TD></TR></TABLE> <A NAME="fields_inherited_from_class_java.util.EventObject"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Fields inherited from class java.util.<A HREF="../../../java/util/EventObject.html">EventObject</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../java/util/EventObject.html#source">source</A></CODE></TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../java/awt/event/ItemEvent.html#ItemEvent(java.awt.ItemSelectable, int, java.lang.Object, int)">ItemEvent</A></B>(<A HREF="../../../java/awt/ItemSelectable.html">ItemSelectable</A> source, int id, <A HREF="../../../java/lang/Object.html">Object</A> item, int stateChange)</CODE><BR> Constructs an ItemEvent object.</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../java/lang/Object.html">Object</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/event/ItemEvent.html#getItem()">getItem</A></B>()</CODE><BR> Returns the item affected by the event.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../java/awt/ItemSelectable.html">ItemSelectable</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/event/ItemEvent.html#getItemSelectable()">getItemSelectable</A></B>()</CODE><BR> Returns the originator of the event.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/event/ItemEvent.html#getStateChange()">getStateChange</A></B>()</CODE><BR> Returns the type of state change (selected or deselected).</TD></TR>⌨️ 快捷键说明
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