我的java applet有些问题...... MouseMotionListener在eclipse applet viewer中工作，但在浏览器上不工作（我试过Chrome和Firefox和IE）。在游戏中，我尝试使用鼠标移动对象。 MouseMotionListener位于initComponents方法中。
package tk.miloskostadinovski.game;
import java.applet.Applet;
import java.awt.Button;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.MouseInfo;
import java.awt.Point;
import java.awt.PointerInfo;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Random;
import javax.swing.SwingUtilities;
public class Game extends Applet implements Runnable {
private static final long serialVersionUID = 1L;
// varibles
Thread thread;
boolean running = false;
Random random = new Random();
boolean pauseRunning = false;
int width = 600, height = 700;
int x = 350, y = 560;
int fruitSpeed = 2;
int points = 0;
int lives = 5;
int basketWH = 100;
int fruitWH = 70;
int aX = getRandNumbX(), aY = getRandNumbY();
int oX = getRandNumbX(), oY = getRandNumbY();
int sX = getRandNumbX(), sY = getRandNumbY();
int bX = getRandNumbX(), bY = getRandNumbY();
int hX = getRandNumbX(), hY = getRandNumbY();
int basketX = 350;
int basketY = 580;
private Image i;
private Graphics doubleG;
Image apple, orange, banana, straw, hamburger, background, basket, heart,
mellon;
public void init() {
initComponents();
setSize(width, height);
setLayout(null);
apple = getImage(getDocumentBase(), "pictures/apple.png");
orange = getImage(getDocumentBase(), "pictures/orange.png");
banana = getImage(getDocumentBase(), "pictures/banana.png");
straw = getImage(getDocumentBase(), "pictures/straw.gif");
hamburger = getImage(getDocumentBase(), "pictures/hamburger.png");
background = getImage(getDocumentBase(), "pictures/background.jpg");
basket = getImage(getDocumentBase(), "pictures/basket.png");
heart = getImage(getDocumentBase(), "pictures/heart.png");
mellon = getImage(getDocumentBase(), "pictures/mellon.png");
}
public void start() {
}
public void stop() {
running = false;
if (thread != null) {
try {
thread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public void destroy() {
}
public void run() {
pauseButton.setVisible(true);
while (running) {
while (pauseRunning) {
repaint();
}
fruitMoving();
repaint();
if (aY >= height) {
aY = getRandNumbY();
aX = getRandNumbX();
lives--;
}
if (oY >= height) {
oY = getRandNumbY();
oX = getRandNumbX();
lives--;
}
if (bY >= height) {
bY = getRandNumbY();
bX = getRandNumbX();
lives--;
}
if (sY >= height) {
sY = getRandNumbY();
sX = getRandNumbX();
lives--;
}
if (hY >= height) {
hY = getRandNumbY();
hX = getRandNumbX();
}
if (hY <= basketY + basketWH && hY >= basketY && hX >= basketX - 40
&& hX <= basketX + basketWH) {
lives--;
hY = getRandNumbY();
hX = getRandNumbX();
}
if (sY <= basketY + basketWH && sY >= basketY && sX >= basketX - 40
&& sX <= basketX + basketWH) {
points++;
sY = getRandNumbY();
sX = getRandNumbX();
}
if (bY <= basketY + basketWH && bY >= basketY && bX >= basketX - 40
&& bX <= basketX + basketWH) {
points++;
bY = getRandNumbY();
bX = getRandNumbX();
}
if (oY <= basketY + basketWH && oY >= basketY && oX >= basketX - 40
&& oX <= basketX + basketWH) {
points++;
oY = getRandNumbY();
oX = getRandNumbX();
}
if (aY <= basketY + basketWH && aY >= basketY && aX >= basketX - 40
&& aX <= basketX + basketWH) {
points++;
aY = getRandNumbY();
aX = getRandNumbX();
}
if (basketX >= width - basketWH) {
basketX = width - basketWH;
}
if (basketX <= 0) {
basketX = 0;
}
if (lives <= 0) {
tryAgain.setVisible(true);
while (true) {
if (tryAgain.isVisible() == false) {
aY = getRandNumbY();
aX = getRandNumbX();
oY = getRandNumbY();
oX = getRandNumbX();
sY = getRandNumbY();
sX = getRandNumbX();
bY = getRandNumbY();
bX = getRandNumbX();
hY = getRandNumbY();
hX = getRandNumbX();
lives = 5;
points = 0;
break;
}
}
}
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
@Override
public void paint(Graphics g) {
super.paintComponents(g);
g.drawImage(background, 0, 0, this);
g.drawImage(apple, aX, aY, this);
g.drawImage(orange, oX, oY, this);
g.drawImage(banana, bX, bY, this);
g.drawImage(straw, sX, sY, this);
g.drawImage(hamburger, hX, hY, this);
g.drawImage(basket, basketX, basketY, this);
g.drawImage(heart, 100, 10, this);
g.drawImage(mellon, 20, 10, this);
g.setFont(new Font("Seris", Font.PLAIN, 20));
g.drawString(lives + "", 125, 30);
g.drawString(points + "", 50, 30);
if (lives <= 0) {
g.setFont(new Font("Seris", Font.PLAIN, 30));
g.drawString("Game over", 220, 300);
}
if (pauseRunning) {
g.drawString("Game Paused", 220, 300);
}
}
@Override
public void update(Graphics g) {
if (i == null) {
i = createImage(this.getSize().width, this.getSize().height);
doubleG = i.getGraphics();
}
doubleG.setColor(getBackground());
doubleG.fillRect(0, 0, width, height);
doubleG.setColor(getForeground());
paint(doubleG);
g.drawImage(i, 0, 0, this);
}
public void initComponents() {
// startGame button, pointsBox, livesBox, pause button, game over, play
// again, resume game
setFocusable(true);
addMouseMotionListener(new MouseAdapter() {
@Override
public void mouseMoved(MouseEvent evt) {
formMouseMoved(evt);
}
});
addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent evt) {
formKeyPressed(evt);
}
});
startGame = new Button("Start Game");
startGame.setFocusable(false);
startGame.setLocation(230, 300);
startGame.setSize(130, 40);
startGame.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
startGameActionPerformed(e);
}
});
tryAgain = new Button("Try Again?");
tryAgain.setFocusable(false);
tryAgain.setLocation(230, 350);
tryAgain.setSize(130, 40);
tryAgain.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
tryAgainActionPerformed(e);
}
});
tryAgain.setVisible(false);
pauseButton = new Button("Pause");
pauseButton.setFocusable(false);
pauseButton.setLocation(550, 10);
pauseButton.setSize(40, 25);
pauseButton.setVisible(false);
pauseButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
pauseButtonActionPerformed(e);
}
});
add(startGame);
add(tryAgain);
add(pauseButton);
}
public void startGameActionPerformed(ActionEvent e) {
running = true;
thread = new Thread(this);
thread.start();
startGame.setVisible(false);
}
public void tryAgainActionPerformed(ActionEvent e) {
points = 0;
lives = 5;
tryAgain.setVisible(false);
}
public void pauseButtonActionPerformed(ActionEvent e) {
if (pauseRunning == false) {
pauseRunning = true;
} else {
pauseRunning = false;
}
}
public int getRandNumbX() {
return random.nextInt(520) + 10;
}
public int getRandNumbY() {
return (random.nextInt(+600) + 100) * -1;
}
public void fruitMoving() {
aY += fruitSpeed;
oY += fruitSpeed;
sY += fruitSpeed;
bY += fruitSpeed;
hY += fruitSpeed;
}
public void formMouseMoved(MouseEvent evt) {
PointerInfo a = MouseInfo.getPointerInfo();
Point point = new Point(a.getLocation());
SwingUtilities.convertPointFromScreen(point, evt.getComponent());
basketX = (int) point.getX() - 50;
repaint();
}
public void formKeyPressed(KeyEvent evt) {
if (pauseRunning == false) {
if (evt.getKeyCode() == KeyEvent.VK_RIGHT)
basketX += 20;
if (evt.getKeyCode() == KeyEvent.VK_LEFT)
basketX -= 20;
}
}
// Component declaration
Button startGame, tryAgain, pauseButton;
}