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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 23:38:44 PDT 2000 --><TITLE>Java 2 Platform SE v1.3: Class JFrame</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/JFrame.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="../../javax/swing/JFileChooser.AccessibleJFileChooser.html"><B>PREV CLASS</B></A> <A HREF="../../javax/swing/JFrame.AccessibleJFrame.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="JFrame.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> | <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">javax.swing</FONT><BR>Class JFrame</H2><PRE><A HREF="../../java/lang/Object.html">java.lang.Object</A> | +--<A HREF="../../java/awt/Component.html">java.awt.Component</A> | +--<A HREF="../../java/awt/Container.html">java.awt.Container</A> | +--<A HREF="../../java/awt/Window.html">java.awt.Window</A> | +--<A HREF="../../java/awt/Frame.html">java.awt.Frame</A> | +--<B>javax.swing.JFrame</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../javax/accessibility/Accessible.html">Accessible</A>, <A HREF="../../java/awt/image/ImageObserver.html">ImageObserver</A>, <A HREF="../../java/awt/MenuContainer.html">MenuContainer</A>, <A HREF="../../javax/swing/RootPaneContainer.html">RootPaneContainer</A>, <A HREF="../../java/io/Serializable.html">Serializable</A>, <A HREF="../../javax/swing/WindowConstants.html">WindowConstants</A></DD></DL><HR><DL><DT>public class <B>JFrame</B><DT>extends <A HREF="../../java/awt/Frame.html">Frame</A><DT>implements <A HREF="../../javax/swing/WindowConstants.html">WindowConstants</A>, <A HREF="../../javax/accessibility/Accessible.html">Accessible</A>, <A HREF="../../javax/swing/RootPaneContainer.html">RootPaneContainer</A></DL><P>An extended version of <code>java.awt.Frame</code> that adds support for the JFC/Swing component architecture. You can find task-oriented documentation about using <code>JFrame</code> in <em>The Java Tutorial</em>, in the section <ahref="http://java.sun.com/docs/books/tutorial/uiswing/components/frame.html">How to Make Frames</a>. <p> The <code>JFrame</code> class is slightly incompatible with <code>Frame</code>. Like all other JFC/Swing top-level containers, a <code>JFrame</code> contains a <code>JRootPane</code> as its only child. The <b>content pane</b> provided by the root pane should, as a rule, contain all the non-menu components displayed by the <code>JFrame</code>. This is different from the AWT <code>Frame</code> case. For example, to add a child to an AWT frame you'd write: <pre> frame.add(child); </pre> However using <code>JFrame</code> you need to add the child to the <code>JFrame's</code> content pane instead: <pre> frame.getContentPane().add(child); </pre> The same is true for setting layout managers, removing components, listing children, and so on. All these methods should normally be sent to the content pane instead of the JFrame itself. The content pane will always be non-null. Attempting to set it to null will cause the JFrame to throw an exception. The default content pane will have a BorderLayout manager set on it. <p> Unlike a <code>Frame</code>, a <code>JFrame</code> has some notion of how to respond when the user attempts to close the window. The default behavior is to simply hide the JFrame when the user closes the window. To change the default behavior, you invoke the method <A HREF="../../javax/swing/JFrame.html#setDefaultCloseOperation(int)"><CODE>setDefaultCloseOperation(int)</CODE></A>. To make the <code>JFrame</code> behave the same as a <code>Frame</code> instance, use <code>setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE)</code>. <p> For more information on content panes and other features that root panes provide, see <ahref="http://java.sun.com/docs/books/tutorial/uiswing/components/toplevel.html">Using Top-Level Containers</a> in <em>The Java Tutorial</em>. <p> In a multi-screen environment, you can create a <code>JFrame</code> on a different screen device. See <A HREF="../../java/awt/Frame.html"><CODE>Frame</CODE></A> for more information. <p> For the keyboard keys used by this component in the standard Look and Feel (L&F) renditions, see the <a href="doc-files/Key-Index.html#JFrame">JFrame</a> key assignments. <p> <strong>Warning:</strong> Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. A future release of Swing will provide support for long term persistence.<P><DL><DT><B>See Also: </B><DD><A HREF="../../javax/swing/JRootPane.html"><CODE>JRootPane</CODE></A>, <A HREF="../../javax/swing/JFrame.html#setDefaultCloseOperation(int)"><CODE>setDefaultCloseOperation(int)</CODE></A>, <A HREF="../../java/awt/event/WindowListener.html#windowClosing(java.awt.event.WindowEvent)"><CODE>WindowListener.windowClosing(java.awt.event.WindowEvent)</CODE></A>, <A HREF="../../serialized-form.html#javax.swing.JFrame">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="../../javax/swing/JFrame.AccessibleJFrame.html">JFrame.AccessibleJFrame</A></B></CODE><BR> This class implements accessibility support for the <code>JFrame</code> class.</TD></TR></TABLE> <A NAME="inner_classes_inherited_from_class_java.awt.Frame"><!-- --></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/Frame.html">Frame</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../java/awt/Frame.AccessibleAWTFrame.html">Frame.AccessibleAWTFrame</A></CODE></TD></TR></TABLE> <A NAME="inner_classes_inherited_from_class_java.awt.Window"><!-- --></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/Window.html">Window</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../java/awt/Window.AccessibleAWTWindow.html">Window.AccessibleAWTWindow</A></CODE></TD></TR></TABLE> <A NAME="inner_classes_inherited_from_class_java.awt.Container"><!-- --></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/Container.html">Container</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../java/awt/Container.AccessibleAWTContainer.html">Container.AccessibleAWTContainer</A></CODE></TD>⌨️ 快捷键说明
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