import javax.swing.JFrame;
import java.awt.Graphics;

public class HappyFaceJFrame extends JFrame
{
    public static final int FACE_DIAMETER = 200;
    public static final int X_FACE = 100;
    public static final int Y_FACE = 50;

    public static final int EYE_WIDTH = 10;
    public static final int EYE_HEIGHT = 20;
    public static final int X_RIGHT_EYE = 155;
    public static final int Y_RIGHT_EYE = 100;
    public static final int X_LEFT_EYE = 230;
    public static final int Y_LEFT_EYE = Y_RIGHT_EYE;

    public static final int MOUTH_WIDTH = 100;
    public static final int MOUTH_HEIGHT = 50;
    public static final int X_MOUTH = 150;
    public static final int Y_MOUTH = 160;
    public static final int MOUTH_START_ANGLE = 180;
    public static final int MOUTH_DEGREES_SHOWN = 180;

    public void paint(Graphics canvas)
    {
        //Draw face outline:
        canvas.drawOval(X_FACE, Y_FACE, FACE_DIAMETER, FACE_DIAMETER);
        //Draw eyes:
        canvas.fillOval(X_RIGHT_EYE, Y_RIGHT_EYE, EYE_WIDTH, EYE_HEIGHT);
        canvas.fillOval(X_LEFT_EYE, Y_LEFT_EYE, EYE_WIDTH, EYE_HEIGHT);
        //Draw mouth:
        canvas.drawArc(X_MOUTH, Y_MOUTH, MOUTH_WIDTH, MOUTH_HEIGHT,
                       MOUTH_START_ANGLE, MOUTH_DEGREES_SHOWN);
    }

	public HappyFaceJFrame()
	{
		setSize(600,400);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
	}

	public static void main(String[] args)
	{
		HappyFaceJFrame guiWindow = new HappyFaceJFrame();
		guiWindow.setVisible(true);
	}
}