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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 23:32:51 PDT 2000 --><TITLE>Java 2 Platform SE v1.3: Class MenuItem</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/MenuItem.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/MenuComponent.AccessibleAWTMenuComponent.html"><B>PREV CLASS</B></A> <A HREF="../../java/awt/MenuItem.AccessibleAWTMenuItem.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="MenuItem.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: <A HREF="#inner_class_summary">INNER</A> | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <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</FONT><BR>Class MenuItem</H2><PRE><A HREF="../../java/lang/Object.html">java.lang.Object</A> | +--<A HREF="../../java/awt/MenuComponent.html">java.awt.MenuComponent</A> | +--<B>java.awt.MenuItem</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../javax/accessibility/Accessible.html">Accessible</A>, <A HREF="../../java/io/Serializable.html">Serializable</A></DD></DL><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../java/awt/CheckboxMenuItem.html">CheckboxMenuItem</A>, <A HREF="../../java/awt/Menu.html">Menu</A></DD></DL><HR><DL><DT>public class <B>MenuItem</B><DT>extends <A HREF="../../java/awt/MenuComponent.html">MenuComponent</A><DT>implements <A HREF="../../javax/accessibility/Accessible.html">Accessible</A></DL><P>All items in a menu must belong to the class <code>MenuItem</code>, or one of its subclasses. <p> The default <code>MenuItem</code> object embodies a simple labeled menu item. <p> This picture of a menu bar shows five menu items: <IMG SRC="doc-files/MenuBar-1.gif" ALIGN=CENTER HSPACE=10 VSPACE=7> <br CLEAR=LEFT> The first two items are simple menu items, labeled <code>"Basic"</code> and <code>"Simple"</code>. Following these two items is a separator, which is itself a menu item, created with the label <code>"-"</code>. Next is an instance of <code>CheckboxMenuItem</code> labeled <code>"Check"</code>. The final menu item is a submenu labeled <code>"More Examples"</code>, and this submenu is an instance of <code>Menu</code>. <p> When a menu item is selected, AWT sends an action event to the menu item. Since the event is an instance of <code>ActionEvent</code>, the <code>processEvent</code> method examines the event and passes it along to <code>processActionEvent</code>. The latter method redirects the event to any <code>ActionListener</code> objects that have registered an interest in action events generated by this menu item. <P> Note that the subclass <code>Menu</code> overrides this behavior and does not send any event to the frame until one of its subitems is selected.<P><DL><DT><B>See Also: </B><DD><A HREF="../../serialized-form.html#java.awt.MenuItem">Serialized Form</A></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><A NAME="inner_class_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Inner Class Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected class</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/MenuItem.AccessibleAWTMenuItem.html">MenuItem.AccessibleAWTMenuItem</A></B></CODE><BR> Inner class of MenuItem used to provide default support for accessibility.</TD></TR></TABLE> <A NAME="inner_classes_inherited_from_class_java.awt.MenuComponent"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Inner classes inherited from class java.awt.<A HREF="../../java/awt/MenuComponent.html">MenuComponent</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../java/awt/MenuComponent.AccessibleAWTMenuComponent.html">MenuComponent.AccessibleAWTMenuComponent</A></CODE></TD></TR></TABLE> <!-- =========== FIELD SUMMARY =========== --><!-- ======== 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/MenuItem.html#MenuItem()">MenuItem</A></B>()</CODE><BR> Constructs a new MenuItem with an empty label and no keyboard shortcut.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#MenuItem(java.lang.String)">MenuItem</A></B>(<A HREF="../../java/lang/String.html">String</A> label)</CODE><BR> Constructs a new MenuItem with the specified label and no keyboard shortcut.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#MenuItem(java.lang.String, java.awt.MenuShortcut)">MenuItem</A></B>(<A HREF="../../java/lang/String.html">String</A> label, <A HREF="../../java/awt/MenuShortcut.html">MenuShortcut</A> s)</CODE><BR> Create a menu item with an associated keyboard shortcut.</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> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#addActionListener(java.awt.event.ActionListener)">addActionListener</A></B>(<A HREF="../../java/awt/event/ActionListener.html">ActionListener</A> l)</CODE><BR> Adds the specified action listener to receive action events from this menu item.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#addNotify()">addNotify</A></B>()</CODE><BR> Creates the menu item's peer.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#deleteShortcut()">deleteShortcut</A></B>()</CODE><BR> Delete any <code>MenuShortcut</code> object associated with this menu item.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#disable()">disable</A></B>()</CODE><BR> <B>Deprecated.</B> <I>As of JDK version 1.1, replaced by <code>setEnabled(boolean)</code>.</I></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#disableEvents(long)">disableEvents</A></B>(long eventsToDisable)</CODE><BR> Disables event delivery to this menu item for events defined by the specified event mask parameter.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#enable()">enable</A></B>()</CODE><BR> <B>Deprecated.</B> <I>As of JDK version 1.1, replaced by <code>setEnabled(boolean)</code>.</I></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#enable(boolean)">enable</A></B>(boolean b)</CODE><BR> <B>Deprecated.</B> <I>As of JDK version 1.1, replaced by <code>setEnabled(boolean)</code>.</I></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#enableEvents(long)">enableEvents</A></B>(long eventsToEnable)</CODE><BR> Enables event delivery to this menu item for events to be defined by the specified event mask parameter </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../javax/accessibility/AccessibleContext.html">AccessibleContext</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#getAccessibleContext()">getAccessibleContext</A></B>()</CODE><BR> Gets the AccessibleContext associated with this MenuItem.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../java/lang/String.html">String</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#getActionCommand()">getActionCommand</A></B>()</CODE><BR> Gets the command name of the action event that is fired by this menu item.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../java/lang/String.html">String</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#getLabel()">getLabel</A></B>()</CODE><BR> Gets the label for this menu item.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../java/util/EventListener.html">EventListener</A>[]</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#getListeners(java.lang.Class)">getListeners</A></B>(<A HREF="../../java/lang/Class.html">Class</A> listenerType)</CODE><BR> Return an array of all the listeners that were added to the MenuItem with addXXXListener(), where XXX is the name of the <code>listenerType</code> argument.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../java/awt/MenuShortcut.html">MenuShortcut</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/awt/MenuItem.html#getShortcut()">getShortcut</A></B>()</CODE><BR> Get the <code>MenuShortcut</code> object associated with this menu item,</TD></TR>⌨️ 快捷键说明
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