Question

(Java program) Write an applet that draws two animated cars that must race each other. The race cars should move along a straight line, with each starting behind a Start Line. The user should have the option to set the speed of each car. The speed range is 0 to 100. There should be a Start button to begin the race and an End button to stop the race at any time.

Answer 1

import java.awt.*;

import javax.swing.*;

import java.awt.image.*;

import java.net.url;

import java.awt.event.KeyEvent;

import java.awt.event.KeyListener;

import java.awt.event.ActionEventListener;

import javax.swing.JButton;

public class CarRace extends JPanel

{

int cross_a, cross_b;

int car_a, car_b;

int speed_a, speed_b;

int nOpp;

String imageLoc[];

int la[], lb[];

int score;

int max_score;

int speed_Opp;

boolean isDone;

boolean isUP, isDOWN, isLEFT, isRIGHT;

public CarRace()

{

cross_a = cross_b = -999;

addKeyListener(new KeyListener(){

public void keyTyped(keyEvent e)

}

public void keyReleased(keyEvent e){

car_stop(e);

public void keyPressed(keyEvent e){

car_move(e);

}});

jButton play = new JButton("play");

play.ActionEventListener(new ActionListener()

{

public void ActionPerformed(ActionEvent e)

{

CarRace play = new CarRace();

}

});

car_a = car_b = 0;

speed_a = speed_b = 0;

nOpp = 0;

la = new int[20];

lb = new int[20];

imageLoc = new String[20];

speed_Opp = new int[20];

score = max_score = 0;

}

public void paint(Graphics g){

super.paint(g);

Graphics2D obj = (Graphics2D) g;

obj.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

try{

obj.drawImage(getToolkit().getImage("images/straight_road.jpg"), 0, 0, this);

if (cross_a >= -499 && cross_b >= -499)

obj.drawImage(getToolkit().getImage("images/cross_road.jpg"), cross_x, cross_y, this);

obj.drawImage(getToolkit().getImage("images/get_car.jpg"), car_a, car_b, this);

}

catch(Exception e){

System.out.println(e);

}

void Road_move(int count){

if(cross_a == -999 && cross_b == -999)

if(count % 10 == 0)

cross_a = 499;

cross_b = 0;

}}

else

cross_a--;

if(cross_a = -499 && cross_b = 0)

cross_a = cross_b = -999;

car_a += speed_a;

car_b += speed_b;

if (car_a < 0)

car_a = 0;

int index[] = new int[nOpp]

for(int i = 0; i < nOpp; i++){

if(la[i] >= 127)

index[i] == 1

}

int c = 0;

for(int i = 0; i < nOpp; i++){

if(index[i] == 1){

imageLoc[c] = imageLoc[i];

la[c] = la[i];

lb[c] = lb[i];

speed_Opp[c] = speed_Opp[i];

c++;

}

}

score += nOpp - c;

if(score > max_score)

max_score = score;

nOpp = c;

void Finish()

{

String str = "";

this.repaint();

if(score == max_score && score != 0)

str = "\n Congratulations...!!!You won";

JOptionPane.showMessageDialog(this, "Game Over!!\n Your score" :+score+"\nMax score" :+max_score+str)

System.exit(ABORT);

public void car_move(KeyEvent e){

if(e.getKeyCode() == KeyEvent.VK_UP){

isUP = true;

speed_a = 1;

if(e.getKeyCode() == KeyEvent.VK_DOWN){

isDOWN = true;

speed_a = -2;

if(e.getKeyCode() == KeyEvent.VK_RIGHT){

isRIGHT = true;

speed_b = 1;

if(e.getKeyCode() == KeyEvent.VK_LEFT){

isLEFT = true;

speed_b = -1;

}

}

public void car_stop(keyEvent e){

if(e.getKeyCode() == KeyEvent.VK_UP){

isUP = false;

speed_a = 0;

if(e.getKeyCode() == KeyEvent.VK_DOWN){

isDOWN = false;

speed_a = 0;

if(e.getKeyCode() == KeyEvent.VK_RIGHT){

isRIGHT = false;

speed_b = 0;

if(e.getKeyCode() == KeyEvent.VK_LEFT){

isLEFT = false;

speed_b = 0;

public static void main(String arge[]){

JFrame Frame = new JFrame("Car Racing Game");

CarRace game = new CarRace();

frame.add(game);

frame.setSize(500, 500);

frame.setVisible(true);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

int count = 1, c = 1;

while(true){

game.Road_move(count){

while (c <= 1){

game.repaint();

}

c++;

}

c = 1;

count++;

}

}