import javax.swing.*;
import java.awt.*;//needed for the Color class

public class SecondWindow extends JFrame
{
    public static final int WIDTH = 200;
    public static final int HEIGHT = 200;

    public SecondWindow()
    {
        super();

        setSize(WIDTH, HEIGHT);

        Container contentPane = getContentPane();
        JLabel label = new JLabel("Now available in color!");
        contentPane.add(label);

        setTitle("Second Window");
        contentPane.setBackground(Color.blue);

        addWindowListener(new WindowDestroyer());
   }

    public SecondWindow(Color customColor)
    {
        super();

        setSize(WIDTH, HEIGHT);

        Container contentPane = getContentPane();
        JLabel label = new JLabel("Now available in color!");
        contentPane.add(label);

        setTitle("Second Window");
        contentPane.setBackground(customColor);

        addWindowListener(new WindowDestroyer());
   }
}