Source:

// Question 12.6
import java.applet.Applet;
import java.awt.event.*;
import java.awt.*;

public class q126 extends Applet implements ActionListener

{
Button button;
float Number;

public void init()
{
button = new Button("Random");
button.addActionListener(this);
add(button);
}

public void paint(Graphics g)
{
g.drawString ("The random number generated is: " +Number,10,50);
}

public void actionPerformed(ActionEvent e)
{
Number = (float) (Math.random());
repaint();
}
}