LineBreakMeasurer with anti-aliased text

Question

Hello,
I am developing an application, which needs to render anti-aliased text. The application uses LineBreakMeasurer for text layout. Without anti-aliasing, LineBreakMeasurer works perfectly. However, when I turn anti-aliasing on, the text lines returned by LineBreakMeasurer.nextLayout() are too long (that is, longer than the specified wrapping width).
For example, if I call
TextLayout layout = measurer.nextLayout(92.0);
then
layout.getAdvance()
might return 101.0.
Has anybody been able to make LineBreakMeasurer to work with anti-aliased text?
Thanks,
-Tero

Answer 1

My english is not so good, I hope this help to you.
import javax.swing.*;
import java.awt.*;
import java.awt.font.*;
import java.awt.event.*;
import java.text.*;
public class ParagraphLayout extends JFrame{
  public static void main(String[] args) {
    JFrame f = new ParagraphLayout("ParagraphLayout");
    f.getContentPane().add(new Test());
    f.setVisible(true);
  public ParagraphLayout(String title) {
    super(title);
    createUI();
  protected void createUI() {
    setSize(500, 400);
    center();
    addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        dispose();
        System.exit(0);
  public void center() {
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = getSize();
    int x = (screenSize.width - frameSize.width) / 2;
    int y = (screenSize.height - frameSize.height) / 2;
    setLocation(x, y);
class Test extends JPanel{
       public Test(){
            super();
      public void update(Graphics g){
           paintComponent(g);
      public void paintComponent(Graphics g) {
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
            RenderingHints.VALUE_ANTIALIAS_ON);
        // From _One Hundred Years of Solitude_ by Gabriel Garcia Marquez.
        String s = "Jos\u00e9 Arcadio Buend\u00eda spent the long months " +
           "of the rainy season shut up in a small room that he " +
           "had built in the rear of the house so that no one " +
           "would disturb his experiments. Having completely abandoned " +
           "his domestic obligations, he spent entire nights in the " +
           "courtyard watching the course of the stars and he almost " +
           "contracted sunstroke from trying to establish an exact method " +
           "to ascertain noon. When he became an expert in the use and " +
           "manipulation of his instruments, he conceived a notion of " +
           "space that allowed him to navigate across unknown seas, " +
           "to visit uninhabited territories, and to establish " +
           "relations with splendid beings without having to leave " +
           "his study. That was the period in which he acquired the habit " +
           "of talking to himself, of walking through the house without " +
           "paying attention to anyone...";
        Font font = new Font("Serif", Font.PLAIN, 24);
        AttributedString as = new AttributedString(s);
        as.addAttribute(TextAttribute.FONT, font);
        AttributedCharacterIterator aci = as.getIterator();
        FontRenderContext frc = g2.getFontRenderContext();
        LineBreakMeasurer lbm = new LineBreakMeasurer(aci, frc);
        Insets insets = getInsets();
        float wrappingWidth = getSize().width - insets.left - insets.right;
        float x = insets.left;
        float y = insets.top;
        while (lbm.getPosition() < aci.getEndIndex()) {
          TextLayout textLayout = lbm.nextLayout(wrappingWidth);
          y += textLayout.getAscent();
          textLayout.draw(g2, x, y);
          y += textLayout.getDescent() + textLayout.getLeading();
          x = insets.left;
}