java test all font

FontTest.java

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;

public class FontTest extends JFrame {
    
    String font = "Dialog";
    int size = 12;
    int fontStyleBold = 0;
    int fontStyleItalic = 0;
    
    JLabel fontNameLabel = new JLabel("Font Name");
    JComboBox fontName;
    
    JLabel fontSizeLabel = new JLabel("Font Size");
    JComboBox fontSize;
    
    MessagePanel message = new MessagePanel("Java is cool!");
    
    JCheckBox centered = new JCheckBox("Centered");
    JCheckBox bold = new JCheckBox("Bold");
    JCheckBox italic = new JCheckBox("Italic");
    
    GraphicsEnvironment locale = GraphicsEnvironment.getLocalGraphicsEnvironment();
    
    FontTest() {
        String[] fonts = locale.getAvailableFontFamilyNames();
        fontName = new JComboBox(fonts);
        
        fontSize = new JComboBox(getFontSizes());
        
        JPanel fontNamePanel = new JPanel(new BorderLayout(10, 10));
        fontNamePanel.add(fontNameLabel, BorderLayout.WEST);
        fontNamePanel.add(fontName, BorderLayout.CENTER);
        
        JPanel fontSizePanel = new JPanel(new BorderLayout(10, 10));
        fontSizePanel.add(fontSizeLabel, BorderLayout.WEST);
        fontSizePanel.add(fontSize, BorderLayout.CENTER);
        
        JPanel northPanel = new JPanel(new BorderLayout(10, 10));
        northPanel.setBorder(new EmptyBorder(10, 10, 10, 10));
        northPanel.add(fontNamePanel, BorderLayout.CENTER);
        northPanel.add(fontSizePanel, BorderLayout.EAST);
        
        JPanel southPanel = new JPanel();
        southPanel.add(centered);
        southPanel.add(bold);
        southPanel.add(italic);
        
        message.setBackground(Color.yellow);
        
        add(northPanel, BorderLayout.NORTH);
        add(message, BorderLayout.CENTER);
        add(southPanel, BorderLayout.SOUTH);
        
        fontName.addItemListener(new ItemListener() {
            @Override
            public void itemStateChanged(ItemEvent e) {
                font = (String) fontName.getSelectedItem();
                message.setFont(new Font(font, fontStyleBold + fontStyleItalic, size));
                message.repaint();
            }
        });
        
        fontSize.addItemListener(new ItemListener() {
            @Override
            public void itemStateChanged(ItemEvent e) {
                size = (Integer) fontSize.getSelectedItem();
                message.setFont(new Font(font, fontStyleBold + fontStyleItalic, size));
                message.repaint();
            }
        });
        
        bold.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if (bold.isSelected())
                    fontStyleBold = Font.BOLD;
                else
                    fontStyleBold = 0;
                
                message.setFont(new Font(font, fontStyleBold + fontStyleItalic, size));
                message.repaint();
            }
        });
        
        italic.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if (italic.isSelected())
                    fontStyleItalic = Font.ITALIC;
                else
                    fontStyleItalic = 0;
                
                message.setFont(new Font(font, fontStyleBold + fontStyleItalic, size));
                message.repaint();
            }
        });
        
        centered.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if (centered.isSelected())
                    message.setCentered(true);
                else
                    message.setCentered(false);
            }
        });
        
    }
    
    private Integer[] getFontSizes() {
        Integer[] sizes = new Integer[100];
        for (int i = 0; i < 100; i++)
            sizes[i] = i + 1;
        
        return sizes;
    }
    
    public static void main(String[] args) {
        JFrame frame = new FontTest();
        frame.setSize(800, 300);
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}