How Can I Customize Fonts, Sizes, and Colors in Java Applications?

Getting Fonts, Sizes, Boldness, etc.

In Java, accessing predefined fonts, sizes, and colors is crucial for creating visually appealing applications. These elements enhance user experience and enable consistent formatting.

Getting Available Fonts

To obtain a list of available fonts on the system, utilize the following code:

<code class="java">GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
String[] fonts = ge.getAvailableFontFamilyNames();</code>

This command retrieves an array of font family names, which can be displayed in a JComboBox or utilized for further processing.

Determining Font Sizes and Styles

Font size and styles can be set dynamically during runtime. The following example demonstrates font size selection:

<code class="java">JComboBox sizeChooser = new JComboBox(new String[] { "8", "10", "12" });</code>

Similarly, you can create JComboBoxes for font styles, such as bold, italic, and plain.

Complete Example

The following code demonstrates a complete font chooser, displaying font families, sizes, and colors in separate JComboBoxes:

<code class="java">import java.awt.*;
import javax.swing.*;

public class FontChooser {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            // Get available fonts
            GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
            String[] fonts = ge.getAvailableFontFamilyNames();

            // Create comboboxes for fonts, sizes, and colors
            JComboBox fontChooser = new JComboBox(fonts);
            fontChooser.setRenderer(new FontCellRenderer());
            JComboBox sizeChooser = new JComboBox(new String[] { "8", "10", "12" });
            JComboBox colorChooser = new JComboBox(new String[] { "Black", "Blue", "Red" });

            // Create a panel to hold the choosers
            JPanel chooserPanel = new JPanel();
            chooserPanel.add(fontChooser);
            chooserPanel.add(sizeChooser);
            chooserPanel.add(colorChooser);

            // Show the chooser dialog
            JOptionPane.showMessageDialog(null, chooserPanel);
        });
    }
}

// Renderer for the font combobox
class FontCellRenderer extends DefaultListCellRenderer {

    @Override
    public Component getListCellRendererComponent(
            JList list,
            Object value,
            int index,
            boolean isSelected,
            boolean cellHasFocus) {
        JLabel label = (JLabel)super.getListCellRendererComponent(
                list,value,index,isSelected,cellHasFocus);
        Font font = new Font(value.toString(), Font.PLAIN, 20);
        label.setFont(font);
        return label;
    }
}</code>

By using the code provided, you can incorporate font selection and formatting capabilities into your Java applications, enhancing their functionality and visual appeal.

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