import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Primes
{
    // Add any class or instance variables here.
    
    public static int n=100;
    public static boolean[] primes = new boolean[n];
    public static int current=1;
    
    public static void initialize ()
    {
	// Add any initialization code here.
	// This code will be called only once at the start of the program.
	
	for (int i=0 ; i<n ; i++) primes[i] = true;
	for (int i=2 ; i<n ; i++)
	    for (int j=2 ; j<n ; j++)
		if (i*j < n) primes[i*j] = false;
    }
    
    public static void buttonAction ()
    {
	// Add code to handle a button click here.
	// This code will be called every time the user clicks the button.
	// Call the "windowPrint" function to display text to the window.
	
	current++;
	while ((current < n) && (primes[current] == false)) current++;
	if (current < n)
	    windowPrint (Integer.toString (current));
    }
    
    // You should not need to change any code below this point.
    
    public static JLabel label = new JLabel ();
    
    public static void windowPrint (String s)
    {
	label.setText (s);
    }
    
    public static void main (String[] args)
    {
	initialize ();
	JButton button = new JButton ("Click Me!");
	button.addActionListener (new ActionListener () {
		public void actionPerformed (ActionEvent e) { buttonAction(); }
	    });
	label.setText ("-----------------------------------------");
	JPanel panel = new JPanel ();
	panel.add (Box.createRigidArea (new Dimension (20,10)));
	panel.add (button);
	panel.add (Box.createRigidArea (new Dimension (20,10)));
	panel.add (label);
	panel.add (Box.createRigidArea (new Dimension (20,10)));
	JFrame frame = new JFrame ("Program");
	frame.getContentPane().add (panel, BorderLayout.WEST);
	frame.addWindowListener(new WindowAdapter() {
		public void windowClosing (WindowEvent e) { System.exit(0); }
	    });
	frame.pack ();
	frame.setVisible(true);
    }
}