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copied!<p>Sadly, scaling to a larger size from a fixed resolution will always result in some aliasing artifact. Here's an alternative approach that scales the font used by <code>JTextPane</code>.</p> <p>For low-level control, consider <a href="http://download.oracle.com/javase/6/docs/api/java/awt/font/TextLayout.html" rel="nofollow noreferrer"><code>TextLayout</code></a>, which includes a <a href="http://download.oracle.com/javase/6/docs/api/java/awt/font/FontRenderContext.html" rel="nofollow noreferrer"><code>FontRenderContext</code></a> that can manage the anti-aliasing and fractional metrics settings, as seen in this <a href="https://stackoverflow.com/questions/4287269">example</a>.</p> <p><img src="https://i.stack.imgur.com/YAMGH.png" alt="alt text"></p> <pre><code>import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.text.*; /** @see https://stackoverflow.com/questions/4566211 */ public class ScaledJTextPane { private static final int SIZE = 14; private static final String FONT = "Dialog"; private static void createAndShowGUI() { JFrame frame = new JFrame("ScaledJTextPane using BufferedImage"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); final JTextPane tp = new JTextPane(); tp.setFont(new Font(FONT, Font.PLAIN, SIZE)); tp.setPreferredSize(new Dimension(400, 300)); StyledDocument doc = tp.getStyledDocument(); Style defaultStyle = StyleContext.getDefaultStyleContext() .getStyle(StyleContext.DEFAULT_STYLE); Style boldStyle = doc.addStyle("bold", defaultStyle); StyleConstants.setBold(boldStyle, true); String boldText = "Four score and seven years ago "; String plainText = "our fathers brought forth on this continent, " + "a new nation, conceived in Liberty, and dedicated to the " + "proposition that all men are created equal."; try { doc.insertString(doc.getLength(), boldText, boldStyle); doc.insertString(doc.getLength(), plainText, defaultStyle); } catch (BadLocationException ble) { ble.printStackTrace(System.err); } final JPanel panel = new JPanel(); panel.add(tp); final JComboBox zoomCombo = new JComboBox(new String[]{ "75%", "100%", "150%", "175%", "200%"}); zoomCombo.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { String s = (String) zoomCombo.getSelectedItem(); s = s.substring(0, s.length() - 1); double scale = new Double(s).doubleValue() / 100; int size = (int) (SIZE * scale); tp.setFont(new Font(FONT, Font.PLAIN, size)); } }); zoomCombo.setSelectedItem("100%"); JPanel optionsPanel = new JPanel(); optionsPanel.add(zoomCombo); panel.setBackground(Color.WHITE); frame.add(panel, BorderLayout.CENTER); frame.add(optionsPanel, BorderLayout.NORTH); frame.pack(); frame.setVisible(true); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { createAndShowGUI(); } }); } } </code></pre>

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