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How to obtain FontMetrics of different fonts |
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This Java Swing tip illustrates a method of obtaining FontMetrics of different
fonts available. FontMetrics are usually used to obtain information about the
widths and heights of characters and strings when drawing text on a surface. A
FontMetrics object references a font and surface since fonts may have different
metrics on different surfaces.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Metrics extends JFrame {
public Metrics() {
super( "Demonstrating FontMetrics" );
setSize( 510, 210 );
show();
}
public void paint( Graphics g ) {
g.setFont( new Font( "SansSerif", Font.BOLD, 12 ) );
FontMetrics fm = g.getFontMetrics();
g.drawString( "Current font: " + g.getFont(), 10, 40 );
g.drawString( "Ascent: " + fm.getAscent(), 10, 55 );
g.drawString( "Descent: " + fm.getDescent(), 10, 70 );
g.drawString( "Height: " + fm.getHeight(), 10, 85 );
g.drawString( "Leading: " + fm.getLeading(), 10, 100 );
Font font = new Font( "Serif", Font.ITALIC, 14 );
fm = g.getFontMetrics( font );
g.setFont( font );
g.drawString( "Current font: " + font, 10, 130 );
g.drawString( "Ascent: " + fm.getAscent(), 10, 145 );
g.drawString( "Descent: " + fm.getDescent(), 10, 160 );
g.drawString( "Height: " + fm.getHeight(), 10, 175 );
g.drawString( "Leading: " + fm.getLeading(), 10, 190 );
}
public static void main( String args[] ) {
Metrics app = new Metrics();
app.addWindowListener(
new WindowAdapter() {
public void windowClosing( WindowEvent e ) {
System.exit( 0 );
}
}
);
}
}
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