Hi so I need help with this program. The RandomWalker.java compiles but the TestRandomWalker.java that was provided doesn't compile. Am I doing something wrong?

RandomWalker.java

public class RandomWalker

{

//declare instance variables

private int x;

private int y;

private int steps;

//default constructor

public RandomWalker()

{

x=0;

y=0;

}

//Parameter constructor to set x and y values

public RandomWalker(int x,int y)

{

this.x=x;

this.y=y;

}

/**

*Instructs this random walker toupdate its coordinates by randomly

*making one of the 4 possible moves (up, down, left, or right).

*/

public void move()

{

//increment the steps by 1

steps++;

//generate a random value in a range of 0-1

double rand = Math.random();

if(rand < 0.25)

++x; // move to right

else if(rand < 0.5)

--y; // move to up

else if(rand < 0.75)

--x; // move to left

else if(rand < 1.0)

++y;// move to down

}

/**

*Random walker's current x-coordinate.

*@return random walkers x-coordinate

*/

public int getX()

{

return x;

}

/**

* Returns this random walker's current y-coordinate.

*@return random walker's y-coordinate

*/

public int getY()

{

return y;

}

/**

*Returns the number of steps this random walker has taken.

*@return the number of time move was called

*/

public int getSteps()

{

return steps;

}

}

----------------------------------------------------------

TestRandomWalker.java

import java.awt.*;

public class TestRandomWalker {

public static final int STEPS = 500;

public static void main(String[] args) {

RandomWalker walker = new RandomWalker();

DrawingPanel panel = new DrawingPanel(500, 500);

Graphics g = panel.getGraphics();

// advanced features -- center and zoom in the image

panel.getGraphics().translate(250, 250);

panel.getGraphics().scale(4, 4);

// make the walker walk, and draw its movement

int prevX = walker.getX();

int prevY = walker.getY();

for (int i = 1; i <= STEPS; i++) {

g.setColor(Color.BLACK);

g.drawLine(prevX, prevY, walker.getX(), walker.getY());

walker.move();

prevX = walker.getX();

prevY = walker.getY();

g.setColor(Color.RED);

g.drawLine(prevX, prevY, walker.getX(), walker.getY());

int steps = walker.getSteps();

if (steps % 10 == 0) {

System.out.println(steps + " steps");

}

panel.sleep(100);

}

}

}