A simple font-viewer for java

JavaFontsViewer.java

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.lang.reflect.InvocationTargetException;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.SwingUtilities;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultStyledDocument;
import javax.swing.text.Style;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyleContext;
import javax.swing.text.StyledDocument;

@SuppressWarnings("serial")
public class JavaFontsViewer extends JFrame {

    JTextPane textPane;
    Container container;
    StyledDocument document = new DefaultStyledDocument();

    public JavaFontsViewer() throws BadLocationException {
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        setSize(800, 600);
        setPreferredSize(new Dimension(800, 600));

        setTitle("Java Fonts Viewer");

        container = getContentPane();
        container.setLayout(new BorderLayout());

        textPane = new JTextPane(document);
        container.add(new JScrollPane(textPane), BorderLayout.CENTER);

        Style style = document.getStyle(StyleContext.DEFAULT_STYLE);

        String originFontFamily = (String) style.getAttribute(StyleConstants.FontFamily);

        GraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment();
        Font[] fonts = e.getAllFonts(); // Get the fonts
        for (Font f : fonts) {
            style.addAttribute(StyleConstants.FontSize, 24);
            style.addAttribute(StyleConstants.FontFamily, originFontFamily);
            document.insertString(document.getLength(), f.getFontName() + "    ", style);

            style.addAttribute(StyleConstants.FontFamily, f.getFamily());
            document.insertString(document.getLength(), f.getFontName() + "    字型檢視器\n", style);
        }

        textPane.setEditable(false);
        setVisible(true);
    }

    public static void main(String[] args) throws InterruptedException, InvocationTargetException {
        SwingUtilities.invokeAndWait(new Runnable() {

            @Override
            public void run() {
                try {
                    new JavaFontsViewer();
                } catch (BadLocationException e) {
                    e.printStackTrace();
                }
            }
        });
    }

}