745: Mainline

Naturally, Java allows you to use a variety of font families, such as Roman and Helvetica. Java also allows you to use any of three font styles: plain, bold, and italic. And Java allows you to use a variety of font sizes, specified in points.

To control the font, style, and size, you create instances of the Font class; you then use the setFont method to associate those instances with the graphics context.

For example, the following version of the print method writes a string using a 12-point Helvetica bold font:

import java.awt.*;
import javax.swing.*;
public class Meter extends JComponent implements MeterInterface {
 String title = "Title to Be Supplied";
 int minValue, maxValue, value;
 public Meter (int x, int y) {
  minValue = x;
  maxValue = y;
  value = (y + x) / 2;
 }
 public void setValue(int v) {value = v; repaint();}
 public void setTitle(String t) {title = t; repaint();}
 public int getValueAtCoordinates (int x, int y) {
  Dimension d = getSize();
  int meterWidth = d.width * 3 / 4;
  int xOffset = (d.width - meterWidth) / 2;
  float fraction = (float)(x - xOffset) / meterWidth;
  return (int)Math.round(fraction * (maxValue - minValue) + minValue);
 }
 public void paint(Graphics g) {
  g.setFont(new Font("Helvetica", Font.BOLD, 12));      
  g.drawString(title, 100, 50); 
 } 
} 

If you want a plain font, substitute PLAIN for BOLD. If you want an italic font, substitute ITALIC for BOLD.