about java source code

[rattlesnake420]

ok i found this source code for the game tic tac toe
if someone could please help me out in how to run this with what program id appreciate it
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.net.*;
import java.applet.*;

/**
* A TicTacToe applet. A very simple, and mostly brain-dead
* implementation of your favorite game! <p>
*
* In this game a position is represented by a white and black
* bitmask. A bit is set if a position is ocupied. There are
* 9 squares so there are 1<<9 possible positions for each
* side. An array of 1<<9 booleans is created, it marks
* all the winning positions.
*
* @vjava
* @author Ishfaq Abida
* @modified 23/12/2000 Ishfaq Abida : winning sounds
* @modified 24/12/2000 Ishfaq Abida : added destroy()
*/
public
class TicTacToe extends Applet implements MouseListener {
/**
* White's current position. The computer is white.
*/
int white;

/**
* Black's current position. The user is black.
*/
int black;

/**
* The squares in order of importance...
*/
final static int moves[] = {4, 0, 2, 6, 8, 1, 3, 5, 7};

/**
* The winning positions.
*/
static boolean won[] = new boolean[1 << 9];
static final int DONE = (1 << 9) - 1;
static final int OK = 0;
static final int WIN = 1;
static final int LOSE = 2;
static final int STALEMATE = 3;

/**
* Mark all positions with these bits set as winning.
*/
static void isWon(int pos) {
for (int i = 0 ; i < DONE ; i++) {
if ((i & pos) == pos) {
won[i] = true;
}
}
}

/**
* Initialize all winning positions.
*/
static {
isWon((1 << 0) | (1 << 1) | (1 << 2));
isWon((1 << 3) | (1 << 4) | (1 << 5));
isWon((1 << 6) | (1 << 7) | (1 << 8));
isWon((1 << 0) | (1 << 3) | (1 << 6));
isWon((1 << 1) | (1 << 4) | (1 << 7));
isWon((1 << 2) | (1 << 5) | (1 << 8));
isWon((1 << 0) | (1 << 4) | (1 << 8));
isWon((1 << 2) | (1 << 4) | (1 << 6));
}

/**
* Compute the best move for white.
* @return the square to take
*/
int bestMove(int white, int black) {
int bestmove = -1;

loop:
for (int i = 0 ; i < 9 ; i++) {
int mw = moves[i];
if (((white & (1 << mw)) == 0) && ((black & (1 << mw)) == 0)) {
int pw = white | (1 << mw);
if (won[pw]) {
// white wins, take it!
return mw;
}
for (int mb = 0 ; mb < 9 ; mb++) {
if (((pw & (1 << mb)) == 0) && ((black & (1 << mb)) == 0)) {
int pb = black | (1 << mb);
if (won[pb]) {
// black wins, take another
continue loop;
}
}
}
// Neither white nor black can win in one move, this will do.
if (bestmove == -1) {
bestmove = mw;
}
}
}
if (bestmove != -1) {
return bestmove;
}

// No move is totally satisfactory, try the first one that is open
for (int i = 0 ; i < 9 ; i++) {
int mw = moves[i];
if (((white & (1 << mw)) == 0) && ((black & (1 << mw)) == 0)) {
return mw;
}
}

// No more moves
return -1;
}

/**
* User move.
* @return true if legal
*/
boolean yourMove(int m) {
if ((m < 0) || (m > 8)) {
return false;
}
if (((black | white) & (1 << m)) != 0) {
return false;
}
black |= 1 << m;
return true;
}

/**
* Computer move.
* @return true if legal
*/
boolean myMove() {
if ((black | white) == DONE) {
return false;
}
int best = bestMove(white, black);
white |= 1 << best;
return true;
}

/**
* Figure what the status of the game is.
*/
int status() {
if (won[white]) {
return WIN;
}
if (won[black]) {
return LOSE;
}
if ((black | white) == DONE) {
return STALEMATE;
}
return OK;
}

/**
* Who goes first in the next game?
*/
boolean first = true;

/**
* The image for white.
*/
Image notImage;

/**
* The image for black.
*/
Image crossImage;

/**
* Initialize the applet. Resize and load images.
*/
public void init() {
notImage = getImage(getCodeBase(), "images/not.gif");
crossImage = getImage(getCodeBase(), "images/cross.gif");

addMouseListener(this);
}

public void destroy() {
removeMouseListener(this);
}

/**
* Paint it.
*/
public void paint(Graphics g) {
Dimension d = getSize();
g.setColor(Color.black);
int xoff = d.width / 3;
int yoff = d.height / 3;
g.drawLine(xoff, 0, xoff, d.height);
g.drawLine(2*xoff, 0, 2*xoff, d.height);
g.drawLine(0, yoff, d.width, yoff);
g.drawLine(0, 2*yoff, d.width, 2*yoff);

int i = 0;
for (int r = 0 ; r < 3 ; r++) {
for (int c = 0 ; c < 3 ; c++, i++) {
if ((white & (1 << i)) != 0) {
g.drawImage(notImage, c*xoff + 1, r*yoff + 1, this);
} else if ((black & (1 << i)) != 0) {
g.drawImage(crossImage, c*xoff + 1, r*yoff + 1, this);
}
}
}
}

/**
* The user has clicked in the applet. Figure out where
* and see if a legal move is possible. If it is a legal
* move, respond with a legal move (if possible).
*/
public void mouseReleased(MouseEvent e) {
int x = e.getX();
int y = e.getY();

switch (status()) {
case WIN:
case LOSE:
case STALEMATE:
play(getCodeBase(), "audio/return.au");
white = black = 0;
if (first) {
white |= 1 << (int)(Math.random() * 9);
}
first = !first;
repaint();
return;
}

// Figure out the row/column
Dimension d = getSize();
int c = (x * 3) / d.width;
int r = (y * 3) / d.height;
if (yourMove(c + r * 3)) {
repaint();

switch (status()) {
case WIN:
play(getCodeBase(), "audio/yahoo1.au");
break;
case LOSE:
play(getCodeBase(), "audio/yahoo2.au");
break;
case STALEMATE:
break;
default:
if (myMove()) {
repaint();
switch (status()) {
case WIN:
play(getCodeBase(), "audio/yahoo1.au");
break;
case LOSE:
play(getCodeBase(), "audio/yahoo2.au");
break;
case STALEMATE:
break;
default:
play(getCodeBase(), "audio/ding.au");
}
} else {
play(getCodeBase(), "audio/beep.au");
}
}
} else {
play(getCodeBase(), "audio/beep.au");
}
}

public void mousePressed(MouseEvent e) {
}

public void mouseClicked(MouseEvent e) {
}

public void mouseEntered(MouseEvent e) {
}

public void mouseExited(MouseEvent e) {
}

public String getAppletInfo() {
return "TicTacToe by Ishfaq Abida";
}
}

[AdamGundry]

This is Java, not JavaScript, so you need the Java compiler and software development kit which is available from java.sun.com (http://java.sun.com/j2se/1.4.2/download.html). Once Java is installed you can put the code in a file called "TicTacToe.java" and compile the program to bytecode with:

javac TicTacToe

You can then make a HTML page to embed the applet created (see the documentation for more details).

Adam

[fredmv]

I'm pretty sure you're supposed to include the extension of the file as well:javac TicTacToe.javaI believe you omit the extension when you want to run the Java application as opposed to compiling it (and in this case you'd use the java command instead). Moving this to the "other" section as it has nothing to do with JavaScript.

[pythondasnake]

Well, for one perhaps I'm missing something.. But the game is never launched within this code. I'll look again but I don't think a main method exists or a test method..

M