Font: getLineMetrics(String str, FontRenderContext frc)

 
import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.font.FontRenderContext;
import java.awt.font.LineMetrics;
import java.awt.geom.Line2D;

import javax.swing.JComponent;
import javax.swing.JFrame;

public class MainClass {
  public static void main(String[] args) {
    JFrame jf = new JFrame("Demo");
    Container cp = jf.getContentPane();
    MyCanvas tl = new MyCanvas();
    cp.add(tl);
    jf.setSize(300, 200);
    jf.setVisible(true);
  }
}

class MyCanvas extends JComponent {

  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 = "www.java2s.com";
    float x = 50, y = 150;

    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);
  }

}

Related examples in the same category

1.	Font.PLAIN
2.	Font.BOLD \| Font.ITALIC
3.	Font.BOLD
4.	Font.ITALIC
5.	Font.TRUETYPE_FONT
6.	new Font(String name, int style, int size)
7.	Font: createFont(int fontFormat, InputStream fontStream)
8.	Font: createGlyphVector(FontRenderContext frc, String str)
9.	Font: deriveFont(int style, float size)
10.	Font: getFamily()
11.	Font: getFontName()
12.	Font: getName()
13.	Font: getStyle()
14.	Font: getSize()
15.	Font: getStringBounds(String str, FontRenderContext frc)

Font: getLineMetrics(String str, FontRenderContext frc) : Font « java.awt « Java by API

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