Applet is the small program, that can work inside a WWW-page. It uses a rectangle inside a page for drawing, user input etc. Below you see the output of "Hello, World" applet:
import java.awt.*;
import java.applet.Applet;
public class HelloWorld extends Applet {
    Font myFont = new Font("TimesRoman", Font.BOLD, 24);
    public void paint(Graphics g) {
        g.setFont(myFont);
        g.setColor(Color.blue);
        g.drawString("Hello, World!", 20, 30);
    }
}
The following text must be used to insert applet into
html-page:
<center> <applet code="HelloWorld.class" width=300 height=40> You should run some Java-enabled browser to see the output of applet... </applet> </center>Look to the Java Tutorial for details.