结论（forums.oracle.com/thread/2573652 与他的帖子一样多，没什么特别的）
- 不是 Java，也不是 Nimbus 错误，这个错误在 Font 中，您可以在 Metal、Win、WinClassic 和 Nimbus Laf 中看到，OTF_Font 在字形上方缺少 2 个像素
。窗户。
。金属 。
。雨云。
。经典的 。
Java6 上的 WinXp
。相对 。
此代码将帮助您找到两种字体之间的差异（并将所有差异报告给作者）
从 (java.awt.font.)TextAttribute 为具体字体返回所有可用属性
您可以从（几乎）所有 TextAttributes 中获取详细属性
有输出
java.awt.font.TextAttribute(family)
java.awt.font.TextAttribute(weight)
java.awt.font.TextAttribute(width)
java.awt.font.TextAttribute(posture)
java.awt.font.TextAttribute(size)
java.awt.font.TextAttribute(transform)
java.awt.font.TextAttribute(superscript)
java.awt.font.TextAttribute(char_replacement)
java.awt.font.TextAttribute(foreground)
java.awt.font.TextAttribute(background)
java.awt.font.TextAttribute(underline)
java.awt.font.TextAttribute(strikethrough)
java.awt.font.TextAttribute(run_direction)
java.awt.font.TextAttribute(bidi_embedding)
java.awt.font.TextAttribute(justification)
java.awt.font.TextAttribute(input method highlight)
java.awt.font.TextAttribute(input method underline)
java.awt.font.TextAttribute(swap_colors)
java.awt.font.TextAttribute(numeric_shaping)
java.awt.font.TextAttribute(kerning)
java.awt.font.TextAttribute(ligatures)
java.awt.font.TextAttribute(tracking)
来自代码 Nimbus L&F
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 {
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", JLabel.CENTER);
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, 5, 5));
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(250, 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, 16);
try {
LookAndFeel lnf = UIManager.getLookAndFeel().getClass().newInstance();
final FontUIResource res = new FontUIResource(fnt);
UIDefaults uiDefaults = lnf.getDefaults();
uiDefaults.put("defaultFont", res);
UIManager.getLookAndFeel().uninitialize();
UIManager.setLookAndFeel(lnf);
} catch (InstantiationException ex) {
Logger.getLogger(SystemFontDisplayer.class.getName()).log(Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
Logger.getLogger(SystemFontDisplayer.class.getName()).log(Level.SEVERE, null, ex);
} catch (UnsupportedLookAndFeelException ex) {
Logger.getLogger(SystemFontDisplayer.class.getName()).log(Level.SEVERE, null, ex);
}
UIDefaults defaults = UIManager.getDefaults();
final FontUIResource res = new FontUIResource(fnt);
Object[] obj = res.getAvailableAttributes();
for (Object objs : obj) {
System.out.println(objs); //returns java.awt.font.TextAttribute
}
defaults.put("defaultFont", res);
SwingUtilities.updateComponentTreeUI(frame);
frame.pack();
}
};
}
public static void main(String arg[]) {
try {
for (UIManager.LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(laf.getName())) {
UIManager.setLookAndFeel(laf.getClassName());
}
}
} 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;
}
}
}
来自代码 Oldies L&Fs
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());
} 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;
}
}
}