// The "FatTurtle" class.
// For drawing graphics with a variety of line widths.
// This class extends the Turtle class
import hsa.Console;
import hsa.book.*;

public class FatTurtle extends Turtle
{
    //Add a new variable
    protected int lineWidth;

    // Only one version of constructor provided.
    public FatTurtle (Console c)
    {
        super (c);
        // Use default setting for other variables defined in Turtle class
        lineWidth = 1;
    } // FatTurtle constructor


    // Add a new method to set LineWidth
    public void setLineWidth (int newWidth)
    {
        lineWidth = newWidth;
    } // setLineWidth method


    // Draw a filled ball of radius and center at (x,y)
    // in the current color
    protected void drawBall (int xc, int yc, int radius)
    {
        int diameter = radius * 2;
        int x = xc - radius;
        int y = yc - radius;
        c.fillOval (x, y, diameter, diameter);
    } // drawBall method


    // Add method drawFatLine
    protected void drawFatLine (int x1, int y1, int x2, int y2)
    {
        // Line is drawn by moving a ball point pen whose ball
        // is half line width.
        // Line is drawn at x values of ball seperated by DX which
        // is half the radius.
        // Constants used in calculation
        final double LEN = Math.sqrt (((x2 - x1) * (x2 - x1)) + ((y2 - y1) * (y2 - y1)));
        final double SINA = (y2 - y1) / LEN;
        final double COSA = (x2 - x1) / LEN;
        final int RADIUS = (lineWidth / 2) + 1;
        final double DX = RADIUS * COSA / 2;
        final double DY = RADIUS * SINA / 2;
        // Set position to draw first ball's center at (x1,y1)
        double xpos = x1;
        double ypos = y1;
        // Draw a series of balls along line from (x1,y1) to (x2,y2).
        do
        {
            drawBall ((int) Math.round (xpos), (int) Math.round (ypos), RADIUS);
            xpos += DX;
            ypos += DY;
        }
        while (Math.sqrt ((x2 - xpos) * (x2 - xpos) + (y2 - ypos) * (y2 - ypos)) >= RADIUS / 2);
    } // drawFatLine method


    // This method overrides
    public void move (int distance)
    {
        double rAngle = angle * Math.PI / 180;
        final int newx = (int) Math.round (x + Math.cos (rAngle) * distance);
        final int newy = (int) Math.round (y + Math.sin (rAngle) * distance);
        if (showing)
        {
            c.setColor (clr);
            if (lineWidth == 1)
                c.drawLine (x, y, newx, newy);
            else
                drawFatLine (x, y, newx, newy);
        }
        x = newx;
        y = newy;
    } // move method
} /* FatTurtle class */

// The "Question5" class.
import java.awt.*;
import hsa.Console;
import hsa.book.*;

public class Question5
{
    static Console c;
    public static void stripes (int number, Color clr1, Color clr2)
    {
        FatTurtle t1 = new FatTurtle (c);
        FatTurtle t2 = new FatTurtle (c);
        t1.setColor (clr1);
        t2.setColor (clr2);
        t1.turnLeft (90);
        t2.turnLeft (90);
        final int linwid = (int) c.getWidth () / number;
        for (int i = 0 ; i < number ; i ++)
        {
            if (i % 2 == 0)
                t1.drawFatLine (i * linwid, 0, (i + 1) * linwid, c.getHeight ());
            else
                t2.drawFatLine (i * linwid, 0, (i + 1) * linwid, c.getHeight ());
        }

    } // The output console


    public static void main (String [] args)
    {
        c = new Console ();
        stripes (5, Color.red, Color.blue);

        // Place your program here.  'c' is the output console
    } // main method



} // Question5 class

hikaru79@ubuntu:~/Java $ javac Question5.java
Question5.java:21: drawFatLine(int,int,int,int) has protected access in hsa.book.FatTurtle
                t1.drawFatLine (i * linwid, 0, (i + 1) * linwid, c.getHeight ());
                  ^
Question5.java:23: drawFatLine(int,int,int,int) has protected access in hsa.book.FatTurtle
                t2.drawFatLine (i * linwid, 0, (i + 1) * linwid, c.getHeight ());
                  ^
2 errors

/// The "Question5" class.
import java.awt.*;
import hsa.Console;
import hsa.book.*;

public class Question5
{
    static Console c;
    public static void stripes (int number, Color clr1, Color clr2)
    {
        FatTurtle t = new FatTurtle (c);
        Color cclr;
        t.setAngle (90);
        final int linwid = (int) c.getWidth () / number;
        t.setLineWidth (linwid);
        for (int i = 0 ; i < number + 1 ; i++)
        {
            cclr = (i % 2 == 0 ? clr1:
            clr2);
            t.setColor (cclr);
            t.setPosition (i * linwid, - linwid);
            t.move (c.getHeight () + 2 * linwid);

        }

    } // The output console


    public static void main (String [] args)
    {
        c = new Console ();
        stripes (25, Color.red, Color.blue);

        // Place your program here.  'c' is the output console
    } // main method
} // Question5 class