imageandsound.java

Java程序设计实验与实训源代码经典的JAVA学习教材

import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.net.*;
import java.applet.*;

public class ImageandSound extends Applet implements MouseListener 
{
    int white;        // White's current position. The computer is white.
    int black;    // Black's current position. The user is black.
    //The squares in order of importance...
final static int moves[]={4, 0, 2, 6, 8, 1, 3, 5, 7};       
    static boolean won[] = new boolean[1 << 9];    // The winning positions.
    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;

    static void isWon(int pos) 
    {       // Mark all positions with these bits set as winning.
              for (int i = 0 ; i < DONE ; i++) 
              {
                     if ((i & pos) == pos) {
                       won[i] = true;
                  }
               }
    }
    static {    // Initialize all winning positions.
       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;
                     }
                         }
                     }
if(bestmove==-1){  
//Neither white nor black can win in one move, this will do.
                                      bestmove = mw;
              }
                         }
              }
       if (bestmove != -1) {
                         return bestmove;
       }
                     for (int i = 0 ; i < 9 ; i++) {   // No move is totally satisfactory, try the first one that is open
                            int mw = moves[i];
             if (((white & (1 << mw)) == 0) && ((black & (1 << mw)) == 0)) {
              return mw;
                  }
              }
                     return -1;        // No more moves
          }
    boolean yourMove(int m) {          // User move. return true if legal
              if ((m < 0) || (m > 8)) {
           return false;
       }
       if (((black | white) & (1 << m)) != 0) {
           return false;
       }
       black |= 1 << m;
       return true;
  }
    boolean myMove() {    // Computer move. return true if legal
                     if ((black | white) == DONE) {
           return false;
       }
       int best = bestMove(white, black);
       white |= 1 << best;
       return true;
    }
    int status() {    // Figure what the status of the game is.
       if (won[white]) {
                         return WIN;
       }
       if (won[black]) {
           return LOSE;
       }
       if ((black | white) == DONE) {
           return STALEMATE;
       }
       return OK;
    }
    boolean first = true;           // Who goes first in the next game?
    Image notImage;        // The image for white.
Image crossImage;    // The image for black.

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

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

    public void paint(Graphics g) {    // Paint it.
                     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;
       }
       Dimension d = getSize();                 // Figure out the row/column
       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 Arthur van Hoff";
  }
}