SystemFontDisplayer.java Source code

Introduction

Here is the source code for SystemFontDisplayer.java

Source

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class SystemFontDisplayer extends JFrame {
    DisplayPanel displayPanel;

    String[] fontStyleLabels = { "Plain", "Bold", "Italic", "Bold&Italic" };
    int BOLDITALIC = Font.BOLD | Font.ITALIC;
    int[] fontStyles = { Font.PLAIN, Font.BOLD, Font.ITALIC, BOLDITALIC };
    String[] fontSizeLabels = { "8", "9", "10", "11", "12", "14", "18", "25", "36", "72" };
    JComboBox fontsBox, fontStylesBox = new JComboBox(fontStyleLabels),
            fontSizesBox = new JComboBox(fontSizeLabels);

    public SystemFontDisplayer() {
        Container container = getContentPane();
        displayPanel = new DisplayPanel();
        container.add(displayPanel);
        JPanel controlPanel = new JPanel();
        controlPanel.setLayout(new GridLayout(1, 3));

        fontsBox = new JComboBox(displayPanel.fontFamilyNames);
        fontsBox.setSelectedItem("Arial");
        fontsBox.addActionListener(new ComboBoxListener());

        fontStylesBox.addActionListener(new ComboBoxListener());

        fontSizesBox.setSelectedItem("36");
        fontSizesBox.addActionListener(new ComboBoxListener());
        controlPanel.add(fontsBox);
        controlPanel.add(fontStylesBox);
        controlPanel.add(fontSizesBox);
        container.add(BorderLayout.SOUTH, controlPanel);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setSize(400, 250);
        setVisible(true);
    }

    public static void main(String arg[]) {
        new SystemFontDisplayer();
    }

    class ComboBoxListener implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            JComboBox tempBox = (JComboBox) e.getSource();

            if (tempBox.equals(fontsBox)) {
                displayPanel.fontFamilyName = (String) tempBox.getSelectedItem();
                displayPanel.repaint();
            } else if (tempBox.equals(fontStylesBox)) {
                displayPanel.fontStyle = fontStyles[tempBox.getSelectedIndex()];
                displayPanel.repaint();
            } else if (tempBox.equals(fontSizesBox)) {
                displayPanel.fontSize = Integer.parseInt((String) tempBox.getSelectedItem());
                displayPanel.repaint();
            }
        }
    }

    class DisplayPanel extends JPanel {
        String fontFamilyName;
        int fontStyle;
        int fontSize;
        String[] fontFamilyNames;

        public DisplayPanel() {
            fontFamilyName = "Arial";
            fontStyle = Font.PLAIN;
            fontSize = 36;
            GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
            fontFamilyNames = ge.getAvailableFontFamilyNames();
            setSize(400, 225);
        }

        public void update(Graphics g) {
            g.clearRect(0, 0, getWidth(), getHeight());
            paintComponent(g);
        }

        public void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D g2D = (Graphics2D) g;
            g2D.setFont(new Font(fontFamilyName, fontStyle, fontSize));
            g2D.drawString("Java 2D Fonts", 25, 100);
        }
    }
}