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

public class Quiz4 extends JFrame
{
    private JButton red, green, blue, yellow;

    Quiz4( String s )
    {
	setTitle ( s );
	red = new JButton("Red");
	green = new JButton("Green");
	blue = new JButton("Blue");
	yellow = new JButton("Yellow");

	Container cp = getContentPane();
	
	cp.add(red, "North");
	cp.add(green,"South");
	cp.add(blue, "East");
	cp.add(yellow, "West");

	red.addActionListener ( new A_handler() );
	green.addActionListener ( new B_handler() );
	blue.addActionListener ( new A_handler() );
	yellow.addActionListener ( new B_handler() );	
	
    }

    class A_handler implements ActionListener
    {
	public void actionPerformed( ActionEvent evt )
	{ System.out.print("A_handler\n"); }
    }

    class B_handler implements ActionListener
    {
	public void actionPerformed( ActionEvent evt )
	{ System.exit(0); }
    }

    public static void main ( String []args )
    {

	Quiz4 q4 = new Quiz4("Quiz 4");
	q4.setVisible(true);
	q4.setSize(300, 300);
    }
}