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Applet listing:

import java.awt.*;
import java.applet.Applet;

public class Applet4 extends Applet {
	TextField		inputField;
	String			displayText = "Enter a string to display";
	int				fontSize = 12;
	CheckboxGroup 	fontSizeField;

public void init() {
		setBackground(Color.white);
				
		add(new Label("Text String:"));
		inputField = new TextField(20);
		add(inputField);
		
		add(new Label("Font Size:"));
		fontSizeField = new CheckboxGroup();		
		add(new Checkbox("12",fontSizeField,true));
		add(new Checkbox("14",fontSizeField,false));
		add(new Checkbox("18",fontSizeField,false));
		add(new Checkbox("24",fontSizeField,false));
	}
	
	public void paint(Graphics g) {
		g.setFont(new Font("TimesRoman",Font.PLAIN,fontSize));
		g.drawString(displayText,200,60);
	} 
					
	public boolean action(Event e, Object arg) {	
		if (e.target instanceof TextField) {
			displayText = inputField.getText();
			repaint();
			return true;
		}
		if (e.target instanceof Checkbox) {
			fontSize = Integer.parseInt(fontSizeField.getCurrent().getLabel());
			repaint();
			return true;
		}
		return false;
	} 
}