Can anyone fix this.??please help.

Question

i want to learn how to program games in java and i found a good tutorial on 1javast.com on making a space invaders applet. i can get the code to compile but the applet doesnt work properly. does anyone have any ideas? here is the code.
import java.awt.image.*;
import java.awt.event.*;
import java.applet.*;
import java.awt.*;
public class Game extends Applet implements Runnable, MouseMotionListener, MouseListener
BufferedImage bufferdImg;
Graphics2D bufferdImgSurface;
Thread gameThread;
int width=400, height=400, MAX=50, speed=10;
int currentX[] = new int[MAX];
int currentY[] = new int[MAX];
int step=0, // Number of movements left/right
direction=1, // Current left/right direction (0=left, 1=right)
shipX=width/2-10, // Current player X possition
shipY=height-45, // Current player Y possition
mbx=-10, // The mouse position after mouse down, sets the_
mby=-10, // enemy bullet position to this.
randomShoot=0, // Used to work out which enemy is shooting
health=50, // The players health
BNUM=10, // Number of bullets
playing=0; // Are is the game playing (0=Playing, 1=Paused, 2=Game Over, 3=Win)
int bX[] = new int[BNUM]; // Bullet X pos.
int bY[] = new int[BNUM]; // Bullet Y pos.
int ebX[] = new int[BNUM]; // Enemy Bullet X pos.
int ebY[] = new int[BNUM]; // Enemy Bullet Y pos.
long start=0, // Frame start time
tick_end_time, // End frame time
tick_duration, // Time taken to display the frame
sleep_duration; // How long to sleep for
static final int MIN_SLEEP_TIME = 10, // Min time to sleep for
MAX_FPS = 20, // Max frame rate.
MAX_MS_PER_FRAME = 1000 / MAX_FPS; // MS per frame
float fps=0, // Current frame rate
dist; // Distance between 2 points
public void start()
Thread gameThread = new Thread(this);
gameThread.start();
public void init()
currentX[0]=0;
currentY[0]=0;
int row=10, // Current Y position
col=10, // Current X position
count=0; // How many circles have been drawn
//set the co-ordinates for each circle
for(int i=0;i<50;i++)
count++;
currentX=col;
col+=25;
currentY[i]=row;
if(count==10)
row+=25;
col=10;
count=0;
addMouseMotionListener(this);
addMouseListener(this);
for(int i=0;i<BNUM;i++)
bX[i]=-10;
bY[i]=-10;
ebX[i]=0;
ebY[i]=height+10;
public void run()
while(true){     // Starts the game loop
start = System.currentTimeMillis(); // Sets the current time
// Are we playing or is the game over?
if(playing==0)
step++;
for(int i=0;i<MAX;i++)
if(step>15)
if(direction==1)
direction=0;
else
direction=1;
step=0;
for(int j=0;j<MAX;j++)
currentY[j]+=speed;
if(direction==1)
currentY[i]+=speed;
else
currentX[i]-=speed;
for(int i=0; i<BNUM;i++)
if(bY[i]<=0)
bX[i]=mbx;
bY[i]=mby;
mbx=-10;
mby=-10;
bY[i]-=speed;
for(int i=0;i<MAX;i++)
for(int j=0;j<BNUM;j++)
if(!(bY[j]<=0))
dist=(int)(Math.sqrt(Math.pow((currentX[i]+10)-bX[j],2)+
Math.pow((currentY[i]+10)-bY[j],2)));
if(dist<=20)
bY[j]=-50;
currentY[i]=-500;
for(int k=0;k<MAX;k++)
randomShoot=(int)(Math.random()*MAX);
if(currentY[randomShoot]>=0)
for(int i=0;i<BNUM;i++)
if(ebY[i]>=height)
ebX[i]=currentX[randomShoot];
ebY[i]=currentY[randomShoot];
break;
//shooting the alien bullets
for(int k=0;k<MAX;k++)
randomShoot=(int)(Math.random()*MAX);
if(currentY[randomShoot]>=0)
for(int i=0;i<BNUM;i++)
if(ebY[i]>=height)
ebX[i]=currentX[randomShoot];
ebY[i]=currentY[randomShoot];
break;
for(int j=0; j < BNUM; j++) {
if(!(ebY[j]>=height)){
dist = (int)(Math.sqrt(Math.pow((shipX+10)-ebX[j],2) + Math.pow((shipY+10)-ebY[j],2)));
if(dist <= 20){
ebY[j]=height+10;
health-=10;
for(int i=0; i < BNUM; i++){
if(ebY[i] < height) {
ebY[i]+=speed;
if(health <=0)
playing=2;
int count=0;
for(int j=0; j < MAX; j++){
if(currentY[j]<0)
count++;
if(currentY[j]>=340)
playing=2;
if(count==MAX)
playing=3;
} else { }
repaint(); // Redraw the screen
public void paint(Graphics g)
update(g);
public void update(Graphics g)
Graphics2D g2 = (Graphics2D)g;
// Set the background color.
bufferdImgSurface.setBackground(Color.black);
// Clear the applet.
bufferdImgSurface.clearRect(0, 0, width, height);
bufferdImgSurface.setColor(Color.green);
//(X pos, Y pos, Width, Height)
for(int i=0; i < MAX; i++)
bufferdImgSurface.fillOval(currentX[i], currentY[i], 20,20);
// Draw the read ship (a square)
bufferdImgSurface.setColor(Color.red);
bufferdImgSurface.fillRect(shipX, shipY, 20, 20);
for(int j=0; j < BNUM; j++){
bufferdImgSurface.setColor(Color.yellow);
bufferdImgSurface.fillOval(bX[j], bY[j], 5,5);
bufferdImgSurface.setColor(Color.blue);
bufferdImgSurface.fillOval(ebX[j], ebY[j], 5,10);
// Draw a bottom line to our window
bufferdImgSurface.setColor(Color.red);
bufferdImgSurface.drawString("_________________________________________________________",0,375);
if(playing==1)
bufferdImgSurface.drawString("PAUSED", width/2-10, 390);
else if(playing==2)
bufferdImgSurface.drawString("****Game Over****", width/2-10, 390);
else if(playing==3)
bufferdImgSurface.drawString("****You Win!****", width/2-10, 390);
for(int i=0; i < health; i++)
bufferdImgSurface.drawString(" |", (2*i), 390);
// Draw the buffered image to the screen.
g2.drawImage(bufferdImg, 0, 0, this);
public void mouseMoved(MouseEvent e) { shipX=e.getX()-5; }
public void mouseDragged(MouseEvent e) { shipX=e.getX()-5; }
public void mouseClicked(MouseEvent e) {
mbx=e.getX();
mby=shipY;
public void mousePressed(MouseEvent e) {
mbx=e.getX();
mby=shipY;
public void mouseEntered(MouseEvent e) { playing=0; }
public void mouseExited(MouseEvent e) { playing=1; }
public void mouseReleased(MouseEvent e) { }

Answer 1

this doesn't come close to compiling