fontmetricsexa.java

Java语言程序设计-源代码（第四部分）和课程相对应的提供了一些用于学习理解的代码设计

import java.awt.*;
import java.applet.*;
public class FontMetricsExa extends Applet{
	public void paint(Graphics g){
		Font f=new Font("TimesRoman",Font.BOLD,40);
		g.setFont(f);
		String s="Hello JavaApplet!";
		FontMetrics fm=g.getFontMetrics();
		int ascent=fm.getAscent();
		int descent=fm.getDescent();
		int leading=fm.getLeading();
		int w=fm.stringWidth(s);
		g.drawLine(50,50,50+w,50);
		g.drawLine(50,50-ascent,50+w,50-ascent);
		g.drawLine(50,50+descent,50+w,50+descent);
		g.drawLine(50,50+descent+leading,50+w,50+descent+leading);
		g.drawString(s,50,50);
		}
}