import javax.swing.*;
import java.awt.*;

public class Drunkard{

    private int x;
    private int y;
    private int numDirection;
    
    Drunkard(){
        this.numDirection = 8;
        this.x = 0;
        this.y = 0;
    }

    private void turnLeft(){
        switch (this.numDirection){
            case (8):   this.numDirection = 4;
                        break;
            case (4):   this.numDirection = 2;
                        break;
            case (2):   this.numDirection = 6;
                        break;
            case (6):   this.numDirection = 8;
                        break;            
        }
    }
    
    private void turnRight(){
        switch (this.numDirection){
            case (8):   this.numDirection = 6;
                        break;
            case (4):   this.numDirection = 8;
                        break;
            case (2):   this.numDirection = 4;
                        break;
            case (6):   this.numDirection = 2;
                        break;            
        }
    }    
    
    private void moveForward(){
        switch (this.numDirection){
            case (8):   this.y -= 1;
                        break;
            case (4):   this.x -= 1;
                        break;
            case (2):   this.y += 1;
                        break;
            case (6):   this.x += 1;
                        break;            
        }        
    }
    
    private void moveBackward(){
        switch (this.numDirection){
            case (8):   this.y += 1;
                        break;
            case (4):   this.x += 1;
                        break;
            case (2):   this.y -= 1;
                        break;
            case (6):   this.x -= 1;
                        break;            
        }        
    }    
    
    private int getX(){
        return this.x;        
    }
    
    private int getY(){
        return this.y;
    }
    
    private void beDrunk(){
            int r = (int)(4 * Math.random());
                switch (r){
                    case 0: turnLeft();
                            break;
                    case 1: turnRight();
                            break;
                    case 2: moveForward();
                            break;
                    case 3: moveBackward();
                            break;
                }
    }
    
    private int distance(){
        int d = (int)(Math.sqrt((getX()*getX()) + (getY()*getY())));
        return d;
    }
    
    public static void main(String[] args){
        
        JFrame window = new JFrame();
        window.setSize(400,400);
        window.setVisible(true);
        
        Container contentPane = window.getContentPane();
        
        Graphics g = contentPane.getGraphics();

            try {
                Thread.sleep(5);
            }
    
            catch (InterruptedException e) {
                System.err.println("sleep exception");
            }  
        
        g.setColor(Color.black);
        g.fillRect(0,0,400,400);
        g.setColor(Color.blue);
        g.fillRect(198,198,4,4);
        g.setColor(Color.green);
        
        Drunkard Tom = new Drunkard();
        int p;
        int q;
            for (int d = 0; d < 1000; d++){
                p = (5 * Tom.getX())+200;
                q = (5 * Tom.getY())+200;
                Tom.beDrunk();
                g.drawLine(p,q,(5 * Tom.getX())+200,(5 * Tom.getY())+200);
        g.setColor(Color.blue);
        g.fillRect(198,198,4,4);
        g.setColor(Color.green);                
                
            try {
                Thread.sleep(5);
            }
    
            catch (InterruptedException e) {
                System.err.println("sleep exception");
            }                 
                
            }
        g.setColor(Color.blue);
        g.fillRect((5 * Tom.getX())+198,(5 * Tom.getY())+198,4,4);
        g.setColor(Color.red);
        g.drawLine(200,200,(5 * Tom.getX()) + 200, (5 * Tom.getY()) + 200);
        g.setColor(Color.green);
        g.drawString("The Drunken Bastard has travelled no more than "+Tom.distance()+" feet!",30,20);
    }
}