FontMetrics

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The FontMetrics Class:
Before we talk too much about the FontMetrics class, it is important to get the meaning of a few terms straight. Refer to the diagram shown below.

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Try out this sample listing to see what it does.

import java.awt.*; import java.applet.*; public class fm extends Applet{ String s, t, u; Dimension d; public void init(){ setBackground(Color.cyan); s="FontMetrics Demonstration"; t="Making Things Fit"; u="On The Page"; d = new Dimension(); d=getSize(); } public void paint(Graphics g){ Font f=new Font("Serif", Font.BOLD, 24); g.setFont(f); FontMetrics fmet = g.getFontMetrics(); int x=fmet.stringWidth(s); x=(d.width-x)/2; g.drawString(s,x,30); x=fmet.stringWidth(t); x=(d.width-x)/2; g.drawString(t,x,60); x=fmet.stringWidth(u); x=(d.width-x)/2; g.drawString(u,x,90); } } //<applet code=fm.class height=120 width=600></applet>

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List of Available Fonts:
The following application will list the available fonts:

import java.awt.Toolkit; class flist{ public static void main(String s[]) { String [] fonts = Toolkit.getDefaultToolkit().getFontList(); System.out.println("Number of different fonts: "+fonts.length); for(int i=0; i<fonts.length; i++) { System.out.println(fonts[i]); } } }

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Further Reading: Font Info

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Assignment: Create an applet which will take input from the user. If the user enters a string between 5 and 36 characters, your applet will then draw that string in the applet area so that it touches both sides of the applet. You will need to use the methods of the FontMetrics class to select an appropriate font size so that all this will work right. Also you will need to make your applet a size which facilitates drawing the string in the applet area.