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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"><html> <head> <title>Example Two: <code>SwingApplication</code> (The Java™ Tutorials > Creating a GUI with JFC/Swing > Learning Swing by Example)</title><style type="text/css"> .FigureCaption { margin-left: 1in; margin-right: 1in; font-family: sans-serif; font-size: smaller; text-align: justify; } #TopBar_bl { background: url(../../images/java_bar_bl.gif) 0 100% no-repeat; width: 100%; height: 60px; } #TopBar_br { background: url(../../images/java_bar_br.gif) 100% 100% no-repeat; width: 100%; height: 60px; } #TopBar_tl { background: url(../../images/java_bar_tl.gif) 0 0 no-repeat; width: 100%; height: 60px; } #TopBar_tr { background: url(../../images/java_bar_tr.gif) 100% 0 no-repeat; width: 100%; height: 60px; } #TopBar { background: #35556B url(../../images/java_bar.gif); margin: 10px 10px 0 10px; height:60px; min-width:700px; color: white; font-family: sans-serif; font-weight: bold; } @media print { #BreadCrumbs, #Download { display: none; 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var main = document.getElementById("MainFlow"); var toggle = document.getElementById("ToggleLeft"); if (b) { contents.className = "LeftBar_shown"; main.className = "MainFlow_indented"; toggle.innerHTML = "Hide the TOC"; document.cookie = 'tutorial_showLeftBar=yes; path=/'; } else { contents.className = "LeftBar_hidden"; main.className = "MainFlow_wide"; toggle.innerHTML = "Show the TOC"; document.cookie = 'tutorial_showLeftBar=no; path=/'; } } function toggleLeft() { showLeft(document.getElementById("LeftBar").className == "LeftBar_hidden"); document.getElementById("ToggleLeft").blur(); } function load() { showLeft(leftBar()); document.getElementById("ToggleLeft").style.display="inline"; } </script> </head><body onload="load()"> <div id=TopBar> <div id=TopBar_tr> <div id=TopBar_tl> <div id=TopBar_br> <div id=TopBar_bl> <div id=TopBar_right> <a target="_blank" href="http://java.sun.com/javase/6/download.jsp">Download the JDK</a> <br> <a href="../../search.html" target="_blank">Search the Tutorials</a> <br> <a href="javascript:toggleLeft()" id="ToggleLeft">Hide the TOC</a> </div> </div> </div> </div> </div> </div> <div class=PrintHeaders> <b>Trail:</b> Creating a GUI with JFC/Swing <br><b>Lesson:</b> Learning Swing by Example </div> <div id=LeftBar class=LeftBar_shown> <div id=Contents> <div class="linkLESSON"><a href="index.html">Learning Swing by Example</a></div><div class="linkAHEAD"><a href="example1.html">Example One: Your First Swing Program</a></div><div class="nolinkAHEAD">Example Two: <code>SwingApplication</code></div><div class="linkAHEAD"><a href="example3.html">Example Three: <code>CelsiusConverter</code></a></div><div class="linkAHEAD"><a href="example4.html">Example Four: An Improved <code>CelsiusConverter</code></a></div><div class="linkAHEAD"><a href="example5.html">Example Five: <code>LunarPhases</code></a></div><div class="linkAHEAD"><a href="example6.html">Example Six: <code>VoteDialog</code></a></div><div class="linkAHEAD"><a href="summary.html">Summary</a></div></div> </div> <div id=MainFlow class=MainFlow_indented> <span id=BreadCrumbs> <a href=../../index.html target=_top>Home Page</a> > <a href=../index.html target=_top>Creating a GUI with JFC/Swing</a> > <a href=index.html target=_top>Learning Swing by Example</a> </span> <div class=NavBit> <a target=_top href=example1.html>« Previous</a> • <a target=_top href=../TOC.html>Trail</a> • <a target=_top href=example3.html>Next »</a> </div> <div id=PageTitle>Example Two: <code>SwingApplication</code></div> <blockquote><!--User Interfaces that Swing: A Quick Start Guide-->Topics illustrated in this example: <UL> <li><A HREF="#lookandfeel">Look and Feel</A> <li><A HREF="#buttonsandlabels">Setting Up Buttons and Labels</A> <li><A HREF="#addComponents">Adding Components to Containers</A> <li><A HREF="#borders">Adding Borders Around Components</A> <li><A HREF="#handlingEvents">Handling Events</A></UL>Let抯 look at another simple program, <a class="SourceLink" target="_blank" href="examples/SwingApplication.java"><code>SwingApplication</code></a>.Each time the user clicks the button (<code>JButton</code>), the label (<code>JLabel</code>) is updated. <p><center><IMG SRC="../../figures/uiswing/learn/3SwingApplication.gif" WIDTH="475" HEIGHT="126" ALIGN="BOTTOM" ALT="The simple GUI of SwingApplication presents a JButton and a JLabel."></center></p><A NAME="lookandfeel"></A><h3>Look and Feel</h3><blockquote>The following screenshots show the GUI of the <code>SwingApplication</code>, each one with a different look and feel.<center><table><tr><td><center><p><center><IMG SRC="../../figures/uiswing/learn/SwingApplication.gif" WIDTH="230" HEIGHT="125" ALIGN="BOTTOM" ALT="Java look and feel"></center></p>Java look and feel<p></center></td><td><center><p><center><IMG SRC="../../figures/uiswing/learn/SwingApplication-gtk.gif" WIDTH="203" HEIGHT="115" ALIGN="BOTTOM" ALT="GTK+ look and feel"></center></p>GTK+ look and feel<p></center></td> </tr><tr><td><center><p><center><IMG SRC="../../figures/uiswing/learn/SwingApplication-ms.gif" WIDTH="222 " HEIGHT="117" ALIGN="BOTTOM" ALT="Windows look and feel"></center></p>Windows look and feel<p></center></td><td><center><p><center><IMG SRC="../../figures/uiswing/learn/SwingApplication-mac.gif" WIDTH="251" HEIGHT="125" ALIGN="BOTTOM" ALT="Mac OS look and feel"></center></p>Mac OS look and feel<p></center></td> </tr></table></center><BR><blockquote><hr><strong>Version Note:</strong> The appearance of many look and feels changes from release to release. For example, in v1.5 we expect the Java look and feel to use slightly different colors and decorations, though components will stay the same size as before.<hr></blockquote>Swing allows you to specify which look and feel your program uses--Java, GTK+, Windows, and so on. The code in bold in the following snippet shows you how <code>SwingApplication</code> specifies that it should use the Java look and feel:⌨️ 快捷键说明
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