在做出所需的选择后，用户将单击按钮并应用字体。
这是我的代码。 .setFont() 方法的正确使用方法是什么？
例如
import java.awt.*;
import java.awt.event.*;
import java.io.IOException;
import java.util.Locale;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;
import javax.swing.plaf.FontUIResource;
import javax.swing.plaf.basic.BasicComboBoxRenderer;
public class SystemFontDisplayer extends JFrame {
private static final long serialVersionUID = 1L;
private JFrame frame = new JFrame("Nimbus UIDeafaults and Font");
private JComboBox fontsBox;
private javax.swing.Timer timer = null;
private JButton testButton = new JButton("testButton");
private JTextField testTextField = new JTextField("testTextField");
private JLabel testLabel = new JLabel("testLabel");
private Font font1, font2;
private JMenuBar menuBar1 = new JMenuBar();
private JMenu menu1 = new JMenu("Menu 1");
private JMenu menu2 = new JMenu("Menu 2");
private JMenuItem menuItem1 = new JMenuItem("MenuItem 1");
private JMenuItem menuItem2 = new JMenuItem("MenuItem 2");
public SystemFontDisplayer() {
try {
font1 = Font.createFont(Font.TRUETYPE_FONT, SystemFontDisplayer.class.getResourceAsStream("/Images/SourceSansPro-Regular.ttf"));
font2 = Font.createFont(Font.TRUETYPE_FONT, SystemFontDisplayer.class.getResourceAsStream("/Images/SourceSansPro-Regular.otf"));
} catch (FontFormatException ex) {
Logger.getLogger(SystemFontDisplayer.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(SystemFontDisplayer.class.getName()).log(Level.SEVERE, null, ex);
}
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
ge.registerFont(font1);
//ge.registerFont(font2);
String[] fontFamilyNames = ge.getAvailableFontFamilyNames(Locale.getDefault());
fontsBox = new JComboBox(fontFamilyNames);
fontsBox.setSelectedItem(0);
fontsBox.setRenderer(new ComboRenderer());
fontsBox.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
if (e.getStateChange() == ItemEvent.SELECTED) {
final String fontName = fontsBox.getSelectedItem().toString();
fontsBox.setFont(new Font(fontName, Font.PLAIN, 16));
start();
}
}
});
fontsBox.setSelectedItem(0);
fontsBox.getEditor().selectAll();
menu1.add(menuItem1);
menuBar1.add(menu1);
menu2.add(menuItem2);
menuBar1.add(menu2);
frame.setJMenuBar(menuBar1);
frame.setLayout(new GridLayout(4, 0, 20, 20));
frame.add(fontsBox);
frame.add(testButton);
frame.add(testTextField);
frame.add(testLabel);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocation(200, 105);
frame.pack();
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
fontsBox.setPopupVisible(true);
fontsBox.setPopupVisible(false);
}
});
frame.setVisible(true);
}
private void start() {
timer = new javax.swing.Timer(750, updateCol());
timer.setRepeats(false);
timer.start();
}
public Action updateCol() {
return new AbstractAction("text load action") {
private static final long serialVersionUID = 1L;
@Override
public void actionPerformed(ActionEvent e) {
final Font fnt = new Font(fontsBox.getSelectedItem().toString(), Font.PLAIN, 12);
final FontUIResource res = new FontUIResource(fnt);
UIManager.getLookAndFeelDefaults().put("Button.font", res);
UIManager.getLookAndFeelDefaults().put("TextField.font", res);
UIManager.getLookAndFeelDefaults().put("Label.font", res);
SwingUtilities.updateComponentTreeUI(frame);
frame.pack();
}
};
}
public static void main(String arg[]) {
/*try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel");
} catch (Exception e) {
e.printStackTrace();
}*/
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
SystemFontDisplayer systemFontDisplayer = new SystemFontDisplayer();
}
});
}
private class ComboRenderer extends BasicComboBoxRenderer {
private static final long serialVersionUID = 1L;
@Override
public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
final Object fntObj = value;
final String fontFamilyName = (String) fntObj;
setFont(new Font(fontFamilyName, Font.PLAIN, 16));
return this;
}
}
}