button.html

API資料大全

</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>command</CODE> - A string used to set the button's
                  action command.
            If the string is <code>null</code> then the action command
            is set to match the label of the button.<DT><B>Since: </B><DD>JDK1.1</DD>
<DT><B>See Also: </B><DD><A HREF="../../java/awt/event/ActionEvent.html"><CODE>ActionEvent</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getActionCommand()"><!-- --></A><H3>
getActionCommand</H3>
<PRE>
public <A HREF="../../java/lang/String.html">String</A> <B>getActionCommand</B>()</PRE>
<DL>
<DD>Returns the command name of the action event fired by this button.
 If the command name is <code>null</code> (default) then this method
 returns the label of the button.<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="addActionListener(java.awt.event.ActionListener)"><!-- --></A><H3>
addActionListener</H3>
<PRE>
public void <B>addActionListener</B>(<A HREF="../../java/awt/event/ActionListener.html">ActionListener</A>&nbsp;l)</PRE>
<DL>
<DD>Adds the specified action listener to receive action events from
 this button. Action events occur when a user presses or releases
 the mouse over this button.
 If l is null, no exception is thrown and no action is performed.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>l</CODE> - the action listener<DT><B>Since: </B><DD>JDK1.1</DD>
<DT><B>See Also: </B><DD><A HREF="../../java/awt/event/ActionListener.html"><CODE>ActionListener</CODE></A>, 
<A HREF="../../java/awt/Button.html#removeActionListener(java.awt.event.ActionListener)"><CODE>removeActionListener(java.awt.event.ActionListener)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="removeActionListener(java.awt.event.ActionListener)"><!-- --></A><H3>
removeActionListener</H3>
<PRE>
public void <B>removeActionListener</B>(<A HREF="../../java/awt/event/ActionListener.html">ActionListener</A>&nbsp;l)</PRE>
<DL>
<DD>Removes the specified action listener so that it no longer
 receives action events from this button. Action events occur
 when a user presses or releases the mouse over this button.
 If l is null, no exception is thrown and no action is performed.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>l</CODE> - the action listener<DT><B>Since: </B><DD>JDK1.1</DD>
<DT><B>See Also: </B><DD><A HREF="../../java/awt/event/ActionListener.html"><CODE>ActionListener</CODE></A>, 
<A HREF="../../java/awt/Button.html#addActionListener(java.awt.event.ActionListener)"><CODE>addActionListener(java.awt.event.ActionListener)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getListeners(java.lang.Class)"><!-- --></A><H3>
getListeners</H3>
<PRE>
public <A HREF="../../java/util/EventListener.html">EventListener</A>[] <B>getListeners</B>(<A HREF="../../java/lang/Class.html">Class</A>&nbsp;listenerType)</PRE>
<DL>
<DD>Return an array of all the listeners that were added to the Button
 with addXXXListener(), where XXX is the name of the <code>listenerType</code>
 argument.  For example, to get all of the ActionListener(s) for the
 given Button <code>b</code>, one would write:
 <pre>
 ActionListener[] als = (ActionListener[])(b.getListeners(ActionListener.class))
 </pre>
 If no such listener list exists, then an empty array is returned.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../java/awt/Component.html#getListeners(java.lang.Class)">getListeners</A></CODE> in class <CODE><A HREF="../../java/awt/Component.html">Component</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>listenerType</CODE> - Type of listeners requested<DT><B>Returns:</B><DD>all of the listeners of the specified type supported by this button<DT><B>Since: </B><DD>1.3</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="processEvent(java.awt.AWTEvent)"><!-- --></A><H3>
processEvent</H3>
<PRE>
protected void <B>processEvent</B>(<A HREF="../../java/awt/AWTEvent.html">AWTEvent</A>&nbsp;e)</PRE>
<DL>
<DD>Processes events on this button. If an event is
 an instance of <code>ActionEvent</code>, this method invokes
 the <code>processActionEvent</code> method. Otherwise,
 it invokes <code>processEvent</code> on the superclass.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../java/awt/Component.html#processEvent(java.awt.AWTEvent)">processEvent</A></CODE> in class <CODE><A HREF="../../java/awt/Component.html">Component</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>e</CODE> - the event.<DT><B>Since: </B><DD>JDK1.1</DD>
<DT><B>See Also: </B><DD><A HREF="../../java/awt/event/ActionEvent.html"><CODE>ActionEvent</CODE></A>, 
<A HREF="../../java/awt/Button.html#processActionEvent(java.awt.event.ActionEvent)"><CODE>processActionEvent(java.awt.event.ActionEvent)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="processActionEvent(java.awt.event.ActionEvent)"><!-- --></A><H3>
processActionEvent</H3>
<PRE>
protected void <B>processActionEvent</B>(<A HREF="../../java/awt/event/ActionEvent.html">ActionEvent</A>&nbsp;e)</PRE>
<DL>
<DD>Processes action events occurring on this button
 by dispatching them to any registered
 <code>ActionListener</code> objects.
 <p>
 This method is not called unless action events are
 enabled for this button. Action events are enabled
 when one of the following occurs:
 <p><ul>
 <li>An <code>ActionListener</code> object is registered
 via <code>addActionListener</code>.
 <li>Action events are enabled via <code>enableEvents</code>.
 </ul><DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>e</CODE> - the action event.<DT><B>Since: </B><DD>JDK1.1</DD>
<DT><B>See Also: </B><DD><A HREF="../../java/awt/event/ActionListener.html"><CODE>ActionListener</CODE></A>, 
<A HREF="../../java/awt/Button.html#addActionListener(java.awt.event.ActionListener)"><CODE>addActionListener(java.awt.event.ActionListener)</CODE></A>, 
<A HREF="../../java/awt/Component.html#enableEvents(long)"><CODE>Component.enableEvents(long)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="paramString()"><!-- --></A><H3>
paramString</H3>
<PRE>
protected <A HREF="../../java/lang/String.html">String</A> <B>paramString</B>()</PRE>
<DL>
<DD>Returns the parameter string representing the state of this
 button. This string is useful for debugging.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../java/awt/Component.html#paramString()">paramString</A></CODE> in class <CODE><A HREF="../../java/awt/Component.html">Component</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the parameter string of this button.</DL>
</DD>
</DL>
<HR>

<A NAME="getAccessibleContext()"><!-- --></A><H3>
getAccessibleContext</H3>
<PRE>
public <A HREF="../../javax/accessibility/AccessibleContext.html">AccessibleContext</A> <B>getAccessibleContext</B>()</PRE>
<DL>
<DD>Gets the AccessibleContext associated with this Button. 
 For buttons, the AccessibleContext takes the form of an 
 AccessibleAWTButton. 
 A new AccessibleAWTButton instance is created if necessary.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="../../javax/accessibility/Accessible.html#getAccessibleContext()">getAccessibleContext</A></CODE> in interface <CODE><A HREF="../../javax/accessibility/Accessible.html">Accessible</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../java/awt/Component.html#getAccessibleContext()">getAccessibleContext</A></CODE> in class <CODE><A HREF="../../java/awt/Component.html">Component</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>an AccessibleAWTButton that serves as the 
         AccessibleContext of this Button</DL>
</DD>
</DL>
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