import java.awt.*;public class TestRandomWalker {public static final int STEPS = 500;public static void main(String[] args) {RandomWalker walker = new RandomWalker(); // instantiate Walker objectDrawingPanel panel = new DrawingPanel(500, 500);Graphics g = panel.getGraphics();// advanced features -- center and zoom in the imagepanel.getGraphics().translate(250, 250);panel.getGraphics().scale(4, 4);// make the walker walk, and draw its movementint prevX = walker.getX(); // initialize Walker displayint prevY = walker.getY();for (int i = 1; i <= STEPS; i++) {g.setColor(Color.BLACK);g.drawLine(prevX, prevY, walker.getX(), walker.getY()); // update Walker displaywalker.move(); // move Walker 1 stepprevX = walker.getX(); // update x valueprevY = walker.getY(); // update y valueg.setColor(Color.RED); g.drawLine(prevX, prevY, walker.getX(), walker.getY()); // update Walker displayint steps = walker.getSteps(); // record Walker stepsif (steps % 10 == 0) {System.out.println(steps + " steps");}panel.sleep(100);}}} Classes1. Define a class named RandomWalker. A RandomWalker object should keep track of its (x, y) location. Allwalkers start at the coordinates (0, 0). When a walker is asked to move, it randomly moves either left, right,up or down. Each of these four moves should occur with equal probability. The resulting behavior isknown as a "random walk." (A 2-dimensional random walk example is pictured at right.)Each RandomWalker object should have the following public methods. You may add whatever fields ormethods you feel are necessary to implement these methods:move ()Instructs this random walker to randomly make one of the 4 possible moves (up, down, left, or right).getX()Returns this random walker's current x-coordinate.getY()Returns this random walker's current y-coordinate.getsteps ()Returns the number of steps this random walker has taken.Random walks have interesting mathematical properties. For example, given infinitely many steps, arandom walker approaches 100% chance of reaching a particular (x, y) coordinate. To learn more aboutrandom walks, visit http://mathworld.wolfram.com/Random Walk.html .Test your RandomWalker by running it with the TestRandomWalker test class, found on the Labs section ofthe course web site. The TestRandomWalker will run your random walker in a loop and animate its positionas it moves.E TCSS 142 Drawing PanelFile

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import java.awt.*;
public class TestRandomWalker {
public static final int STEPS = 500;

public static void main(String[] args) {
RandomWalker walker = new RandomWalker(); // instantiate Walker object

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(); // initialize Walker display
int prevY = walker.getY();
for (int i = 1; i <= STEPS; i++) {
g.setColor(Color.BLACK);
g.drawLine(prevX, prevY, walker.getX(), walker.getY()); // update Walker display

walker.move(); // move Walker 1 step
prevX = walker.getX(); // update x value
prevY = walker.getY(); // update y value

g.setColor(Color.RED);
g.drawLine(prevX, prevY, walker.getX(), walker.getY()); // update Walker display

int steps = walker.getSteps(); // record Walker steps
if (steps % 10 == 0) {
System.out.println(steps + " steps");
}

panel.sleep(100);
}
}
}

Classes
1. Define a class named RandomWalker. A RandomWalker object should keep track of its (x, y) location. All
walkers start at the coordinates (0, 0). When a walker is asked to move, it randomly moves either left, right,
up or down. Each of these four moves should occur with equal probability. The resulting behavior is
known as a "random walk." (A 2-dimensional random walk example is pictured at right.)
Each RandomWalker object should have the following public methods. You may add whatever fields or
methods you feel are necessary to implement these methods:
move ()
Instructs this random walker to randomly make one of the 4 possible moves (up, down, left, or right).
getX()
Returns this random walker's current x-coordinate.
getY()
Returns this random walker's current y-coordinate.
getsteps ()
Returns the number of steps this random walker has taken.
Random walks have interesting mathematical properties. For example, given infinitely many steps, a
random walker approaches 100% chance of reaching a particular (x, y) coordinate. To learn more about
random walks, visit http://mathworld.wolfram.com/Random Walk.html .
Test your RandomWalker by running it with the TestRandomWalker test class, found on the Labs section of
the course web site. The TestRandomWalker will run your random walker in a loop and animate its position
as it moves.
E TCSS 142 Drawing Panel
File

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