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