Frame frame = new ApplicationFrame("LineMetricsIllustrated v1.0") {
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
Font font = new Font("Serif", Font.PLAIN, 72);
g2.setFont(font);
String s = "Porphyry";
float x = 50, y = 150;
// Draw the baseline.
FontRenderContext frc = g2.getFontRenderContext();
float width = (float)font.getStringBounds(s, frc).getWidth();
Line2D baseline = new Line2D.Float(x, y, x + width, y);
g2.setPaint(Color.lightGray);
g2.draw(baseline);
// Draw the ascent.
LineMetrics lm = font.getLineMetrics(s, frc);
Line2D ascent = new Line2D.Float(x, y - lm.getAscent(),
x + width, y - lm.getAscent());
g2.draw(ascent);
// Draw the descent.
Line2D descent = new Line2D.Float(x, y + lm.getDescent(),
x + width, y + lm.getDescent());
g2.draw(descent);
// Draw the leading.
Line2D leading = new Line2D.Float(
x, y + lm.getDescent() + lm.getLeading(),
x + width, y + lm.getDescent() + lm.getLeading());
g2.draw(leading);
// Render the string.
g2.setPaint(Color.black);
g2.drawString(s, x, y);
}
};
frame.setVisible(true);
