我正在开发一个swing应用程序，我可以选择通过单击按钮来更改应用程序的外观。现在我的问题是，当我点击按钮更改主题时，它没有正确更新我的应用程序的L＆amp; F，说我之前的主题是“noire”，我之后选择“MCWin”，但是noire主题的风格是还在那里
以下是示例工作代码：
package whiteboard;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import javax.swing.JFrame;
import javax.swing.JLayeredPane;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.WindowConstants;
public class DiscussionBoard extends JFrame implements ComponentListener,ActionListener {
// Variables declaration
private JMenuItem audioMenuItem;
private JMenuItem boardMenuItem;
private JMenuItem exitMenuItem;
private JMenuItem clientsMenuItem;
private JMenuItem acryl;
private JMenuItem hifi;
private JMenuItem aero;
private JMenuItem aluminium;
private JMenuItem bernstein;
private JMenuItem fast;
private JMenuItem graphite;
private JMenuItem luna;
private JMenuItem mcwin;
private JMenuItem noire;
private JMenuItem smart;
private JMenuBar boardMenuBar;
private JMenuItem messengerMenuItem;
private JMenu openMenu;
private JMenu saveMenu;
private JMenu themesMenu;
private JMenuItem saveMessengerMenuItem;
private JMenuItem saveWhiteboardMenuItem;
private JMenu userMenu;
JLayeredPane layerpane;
/** Creates new form discussionBoard
* @param connection */
public DiscussionBoard()
{
initComponents();
setLocationRelativeTo(null);
addComponentListener(this);
}
private void initComponents() {
boardMenuBar = new JMenuBar();
openMenu = new JMenu();
themesMenu = new JMenu();
messengerMenuItem = new JMenuItem();
boardMenuItem = new JMenuItem();
audioMenuItem = new JMenuItem();
saveMenu = new JMenu();
saveMessengerMenuItem = new JMenuItem();
saveWhiteboardMenuItem = new JMenuItem();
userMenu = new JMenu();
clientsMenuItem = new JMenuItem();
exitMenuItem = new JMenuItem();
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setLayout(new GridBagLayout());
setResizable(false);
setTitle("Discussion Board");
openMenu.setText("Open");
saveMenu.setText("Save");
themesMenu.setText("Themes");
acryl = new JMenuItem("Acryl");
hifi = new JMenuItem("HiFi");
aero = new JMenuItem("Aero");
aluminium = new JMenuItem("Aluminium");
bernstein = new JMenuItem("Bernstein");
fast = new JMenuItem("Fast");
graphite = new JMenuItem("Graphite");
luna = new JMenuItem("Luna");
mcwin = new JMenuItem("MCwin");
noire = new JMenuItem("Noire");
smart = new JMenuItem("Smart");
hifi.addActionListener(this);
acryl.addActionListener(this);
aero.addActionListener(this);
aluminium.addActionListener(this);
bernstein.addActionListener(this);
fast.addActionListener(this);
graphite.addActionListener(this);
luna.addActionListener(this);
mcwin.addActionListener(this);
noire.addActionListener(this);
smart.addActionListener(this);
messengerMenuItem.setText("Messenger");
openMenu.add(messengerMenuItem);
openMenu.add(boardMenuItem);
audioMenuItem.setText("Audio Messenger");
openMenu.add(audioMenuItem);
exitMenuItem.setText("Exit");
exitMenuItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
exitMenuItemActionPerformed(evt);
}
});
openMenu.add(exitMenuItem);
boardMenuBar.add(openMenu);
saveMessengerMenuItem.setText("Messenger");
saveMenu.add(saveMessengerMenuItem);
saveWhiteboardMenuItem.setText("Whiteboard");
saveMenu.add(saveWhiteboardMenuItem);
boardMenuBar.add(saveMenu);
userMenu.setText("Users");
clientsMenuItem.setText("Current Session");
userMenu.add(clientsMenuItem);
themesMenu.add(acryl);
themesMenu.add(hifi);
themesMenu.add(aero);
themesMenu.add(aluminium);
themesMenu.add(bernstein);
themesMenu.add(fast);
themesMenu.add(graphite);
themesMenu.add(luna);
themesMenu.add(mcwin);
themesMenu.add(noire);
themesMenu.add(smart);
boardMenuBar.add(userMenu);
boardMenuBar.add(themesMenu);
saveMessengerMenuItem.setEnabled(false);
saveWhiteboardMenuItem.setEnabled(false);
setJMenuBar(boardMenuBar);
setSize(1024, 740);
setVisible(true);
}
protected void exitMenuItemActionPerformed(ActionEvent evt) {
System.exit(0);
}
@Override
public void componentHidden(ComponentEvent arg0) {
}
@Override
public void componentMoved(ComponentEvent e) {
}
@Override
public void componentResized(ComponentEvent arg0) {
}
@Override
public void componentShown(ComponentEvent arg0) {
}
@Override
public void actionPerformed(ActionEvent e)
{
try
{
if(e.getSource()==hifi)
{
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
SwingUtilities.updateComponentTreeUI(getRootPane());
UIManager.setLookAndFeel("com.jtattoo.plaf.hifi.HiFiLookAndFeel");
enableTheme();
hifi.setEnabled(false);
}
else if(e.getSource()==acryl)
{
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
SwingUtilities.updateComponentTreeUI(getRootPane());
UIManager.setLookAndFeel("com.jtattoo.plaf.acryl.AcrylLookAndFeel");
enableTheme();
acryl.setEnabled(false);
}
else if(e.getSource()==aero)
{
UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
SwingUtilities.updateComponentTreeUI(getRootPane());
UIManager.setLookAndFeel("com.jtattoo.plaf.aero.AeroLookAndFeel");
enableTheme();
aero.setEnabled(false);
}
else if(e.getSource()==aluminium)
{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(getRootPane());
UIManager.setLookAndFeel("com.jtattoo.plaf.aluminium.AluminiumLookAndFeel");
enableTheme();
aluminium.setEnabled(false);
}
else if(e.getSource()==bernstein)
{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(getRootPane());
UIManager.setLookAndFeel("com.jtattoo.plaf.bernstein.BernsteinLookAndFeel");
enableTheme();
bernstein.setEnabled(false);
}
else if(e.getSource()==fast)
{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(getRootPane());
UIManager.setLookAndFeel("com.jtattoo.plaf.fast.FastLookAndFeel");
enableTheme();
fast.setEnabled(false);
}
else if(e.getSource()==graphite)
{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(getRootPane());
UIManager.setLookAndFeel("com.jtattoo.plaf.graphite.GraphiteLookAndFeel");
enableTheme();
graphite.setEnabled(false);
}
else if(e.getSource()==luna)
{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(getRootPane());
UIManager.setLookAndFeel("com.jtattoo.plaf.luna.LunaLookAndFeel");
enableTheme();
luna.setEnabled(false);
}
else if(e.getSource()==mcwin)
{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(getRootPane());
UIManager.setLookAndFeel("com.jtattoo.plaf.mcwin.McWinLookAndFeel");
enableTheme();
mcwin.setEnabled(false);
}
else if(e.getSource()==noire)
{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(getRootPane());
UIManager.setLookAndFeel("com.jtattoo.plaf.noire.NoireLookAndFeel");
enableTheme();
noire.setEnabled(false);
}
else if(e.getSource()==smart)
{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(getRootPane());
UIManager.setLookAndFeel("com.jtattoo.plaf.smart.SmartLookAndFeel");
enableTheme();
smart.setEnabled(false);
}
SwingUtilities.updateComponentTreeUI(getRootPane());
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
private void enableTheme()
{
acryl.setEnabled(true);
hifi.setEnabled(true);
aero.setEnabled(true);
aluminium.setEnabled(true);
bernstein.setEnabled(true);
fast.setEnabled(true);
graphite.setEnabled(true);
luna.setEnabled(true);
mcwin.setEnabled(true);
noire.setEnabled(true);
smart.setEnabled(true);
}
public static void main(String []ar)
{
try
{
UIManager.setLookAndFeel("com.jtattoo.plaf.acryl.AcrylLookAndFeel");
}
catch (Exception e)
{
e.printStackTrace();
}
new DiscussionBoard();
}
}
这里有什么问题？为什么它没有得到更新？
有一个演示应用程序here，它正是我想要的，但我无法清楚地了解它。
Edit: 抱歉，忘了指定库文件，here它是
答案 0 :(得分：1)
在设置LnF的呼叫之后将SwingUtilities.updateComponentTreeUI(getRootPane());呼叫移至。它在传递的组件下面的树中的所有组件上调用updateUI。现在，您正在更新UI，然后更改它们。
答案 1 :(得分：0)
答案 2 :(得分：0)
我尝试了你的例子，它运作良好：
alt text http://img401.imageshack.us/img401/3285/so2763157.png
我在命令行中尝试了以下文件（DiscussionBoard.java目录中的whiteboard）：
JTattooDemo.jar
whiteboard/DiscussionBoard.java
javac whiteboard/DiscussionBoard.java
java -cp ".;JTattooDemo.jar" whiteboard/DiscussionBoard
请注意，JTattoo仅供免费用于非商业用途。