0
好的，所以出於某種原因，當播放器1的槳在屏幕底部下降時，遊戲開始嗡嗡作響。兩位選手都會暫停並停止響應鍵盤輸入，暫停按鈕也會停止工作。然而，球繼續移動，並從牆上跳起，像沒有發生任何事情一樣。我首先認爲這是面板失去焦點時的問題，並添加了focusListener，因此如果面板失去焦點，它將立即再次抓住焦點。但是，這並沒有解決這個奇怪的錯誤。然後我認爲我的KeyListener出了問題，所以在線研究之後，改爲使用鍵綁定，因爲它們顯然更好。但是，即使這樣也行不通，現在我很難過，需要你的幫助。此外，在我添加兩個球員功能之前，我的乒乓球遊戲是單人遊戲，並沒有這個錯誤。但是，單個球拍由上下鍵控制。我知道這是很多代碼，但非常感謝任何幫助。謝謝Java乒乓遊戲幫助。奇怪的錯誤關於沒有響應我的關鍵動作和暫停按鈕的槳沒有工作
主類
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class TableTennis
{
private final static int WIDTH = 700, HEIGHT = 500;
private JFrame window = new JFrame();
//Constructor
public TableTennis()
{
window.setTitle("Table Tennis");
window.setSize(WIDTH,HEIGHT);
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setResizable(false);
//Centers the window on the screen
window.setLocationRelativeTo(null);
PongPanel panel = new PongPanel();
Container pane = window.getContentPane();
pane.add(panel);
/*panel.addFocusListener(new FocusAdapter()
{
public void focusLost(FocusEvent ev)
{
panel.requestFocus();
}
});*/
panel.setFocusable(true);
panel.requestFocusInWindow();
window.setVisible(true);
}//end of constructor
public static void main(String [] args)
{
new TableTennis();
}//end of main
}//end of class
PongPanel類
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.sound.sampled.*;
import java.net.*;
//public class PongPanel extends JPanel implements KeyListener, ActionListener, FocusListener
public class PongPanel extends JPanel implements ActionListener, FocusListener
{
//Instance variables
private int playerScore, player2Score, numberOfTimesResumed, numberOfTimesPaused;
private HumanRacket r1;
private Ball b1;
private ComputerRacket r2;
private HumanRacket r3;
private boolean gameRunning, playerWin, player2Win, gamePaused, onePlayerGame, twoPlayerGame;
private Timer timer;
private Font font;
private int ballBounces;
private JButton playerVsPlayerButton, playerVsComputerButton;
//Constructor;
public PongPanel()
{
playerScore = 0;
ballBounces = 0;
player2Score = 0;
gameRunning = false;
playerWin = false;
player2Win = false;
gamePaused = false;
font = new Font("Courier", Font.BOLD, 16);
setBackground(Color.black);
r1 = new HumanRacket(20, 210);
b1 = new Ball();
r2 = new ComputerRacket(b1);
r3 = new HumanRacket(660,210);
playerVsPlayerButton = new JButton("Two Player");
playerVsPlayerButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
twoPlayerGame = true;
gameRunning = true;
}
});
playerVsComputerButton = new JButton("One Player");
playerVsComputerButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
onePlayerGame = true;
gameRunning = true;
}
});
playerVsPlayerButton.setBackground(Color.WHITE);
playerVsComputerButton.setBackground(Color.WHITE);
playerVsPlayerButton.setFocusable(false);
playerVsComputerButton.setFocusable(false);
timer = new Timer(33, this);
timer.start();
//this.addKeyListener(this);
this.addFocusListener(this);
this.add(playerVsPlayerButton);
this.add(playerVsComputerButton);
//Key Bindings for keys that are pressed
this.addKeyBindingPressed(KeyEvent.VK_W, "Player 1 paddle move up", (evt) ->{
r1.setUpAccel(true);
});
this.addKeyBindingPressed(KeyEvent.VK_S, "Player 1 paddle move down", (evt) -> {
r1.setDownAccel(true);
});
this.addKeyBindingPressed(KeyEvent.VK_P, "Pause Game", (evt) ->{
if(!gamePaused && gameRunning) {
gamePaused = true;
this.pause();
numberOfTimesPaused++;
repaint();
}//end of if
});
this.addKeyBindingPressed(KeyEvent.VK_R, "Resume Game", (evt) -> {
if(numberOfTimesResumed < numberOfTimesPaused)
{
this.resume();
gamePaused = false;
numberOfTimesResumed++;
}//end of if
});
this.addKeyBindingPressed(KeyEvent.VK_UP, "Player 2 paddle move up", (evt) ->{
r3.setUpAccel(true);
});
this.addKeyBindingPressed(KeyEvent.VK_DOWN, "Player 2 paddle move down", (evt) ->{
r3.setDownAccel(true);
});
//Key bindings for keys that are released
this.addKeyBindingReleased(KeyEvent.VK_W, "Player 1 paddle stop moving up", (evt) ->{
r1.setUpAccel(false);
});
this.addKeyBindingReleased(KeyEvent.VK_S, "Player 1 paddle stop moving down", (evt) ->{
r1.setDownAccel(false);
});
this.addKeyBindingReleased(KeyEvent.VK_UP, "Player 2 paddle stop moving up", (evt) ->{
r3.setUpAccel(false);
});
this.addKeyBindingReleased(KeyEvent.VK_DOWN, "Player 2 paddle stop moving down", (evt) ->{
r3.setDownAccel(false);
});
}//end of constructor
public void paintComponent(Graphics g)
{
super.paintComponent(g);
if(gameRunning)
{
this.remove(playerVsPlayerButton);
this.remove(playerVsComputerButton);
}//end of if
if(gameRunning == false && playerWin == false && player2Win == false)
{
g.setColor(Color.white);
g.setFont(font);
g.drawString("Table Tennis ", 300, 100);
g.drawString("Score 5 to win", 290, 130);
g.drawString("Player 1 uses W and S keys to move", 190, 160);
g.drawString("Player 2 uses up and down keys to move", 200, 190);
g.drawString("Press P to Pause and R to Resume", 210, 220);
g.drawString("Created by: Tae-young Kim ", 0, 465);
}//end of if
else if(playerWin == true)
{
if(onePlayerGame)
{
g.setColor(Color.white);
g.setFont(font);
g.drawString("You Win!", 315, 100);
}
else if(twoPlayerGame)
{
g.setColor(Color.white);
g.setFont(font);
g.drawString("Player 1 Wins!", 310, 100);
}
}//end of if
else if(player2Win == true)
{
if(onePlayerGame)
{
g.setColor(Color.white);
g.setFont(font);
g.drawString("Game Over", 315, 100);
}
else if(twoPlayerGame)
{
g.setColor(Color.white);
g.setFont(font);
g.drawString("Player 2 Wins", 310, 100);
}
}//end of if
else if(gamePaused)
{
g.setColor(Color.white);
g.setFont(font);
g.drawString("Game Paused", 310, 100);
g.drawString("Press R to resume", 300, 130);
}//end of else if
//Prints out player score
g.setColor(Color.white);
g.setFont(font);
g.drawString(String.valueOf(playerScore), 50 , 40);
g.drawString(String.valueOf(player2Score), 640, 40);
r1.paint(g);
b1.paint(g);
if(onePlayerGame)
{
r2.paint(g);
}
else if(twoPlayerGame)
{
r3.paint(g);
}
}//end of paintComponent method
/*public void keyPressed(KeyEvent e)
{
if(e.getKeyCode() == KeyEvent.VK_UP)
{
r3.setUpAccel(true);
}//end of if
if(e.getKeyCode() == KeyEvent.VK_DOWN)
{
r3.setDownAccel(true);
}//end of else if
if(e.getKeyCode() == KeyEvent.VK_P)
{
if(!gamePaused && gameRunning) {
gamePaused = true;
this.pause();
numberOfTimesPaused++;
repaint();
}//end of if
}//end of else if
if(e.getKeyCode() == KeyEvent.VK_R)
{
if(numberOfTimesResumed < numberOfTimesPaused)
{
this.resume();
gamePaused = false;
numberOfTimesResumed++;
}//end of if
}//end of else if
if(e.getKeyCode() == KeyEvent.VK_W)
{
r1.setUpAccel(true);
}
if(e.getKeyCode() == KeyEvent.VK_S)
{
r1.setDownAccel(true);
}
}//end of keyPressed method
@Override
public void keyReleased(KeyEvent e)
{
if(e.getKeyCode() == KeyEvent.VK_UP)
{
r3.setUpAccel(false);
}//end of if
if(e.getKeyCode() == KeyEvent.VK_DOWN)
{
r3.setDownAccel(false);
}//end of else if
if(e.getKeyCode() == KeyEvent.VK_W)
{
r1.setUpAccel(false);
}
if(e.getKeyCode() == KeyEvent.VK_S)
{
r1.setDownAccel(false);
}
}//end of keyReleased method
public void keyTyped(KeyEvent e)
{
//Method not useful for this program
}//end of keyTyped method*/
public void actionPerformed(ActionEvent e)
{
if(gameRunning)
{
r1.move();
b1.move();
if(onePlayerGame)
{
r2.move();
}
else if(twoPlayerGame)
{
r3.move();
}
b1.increaseSpeed(ballBounces);
this.checkBallRacketCollision();
this.addScore();
this.checkForWin();
repaint();
this.endGameIfOver();
}//end of if
}//end of actionPerformed method
public void checkBallRacketCollision()
{
if(b1.getXPos() <= r1.getX() + 1)
{
if(b1.getYPos() >= r1.getY() && b1.getYPos() <= r1.getY() + 80)
{
b1.setXVel(b1.getXVel() * -1);
ballBounces++;
playBounceSound();
}//end of if
}//end of if
if(onePlayerGame)
{
if(b1.getXPos() +15 >= r2.getX())
{
if((b1.getYPos() + 7) >= r2.getY() && b1.getYPos() <= r2.getY() + 80)
{
b1.setXVel(b1.getXVel() * -1);
ballBounces++;
playBounceSound();
}//end of if
}//end of if
}
else if(twoPlayerGame)
{
if(b1.getXPos() + 15 >= r3.getX())
{
if((b1.getYPos() + 7) >= r3.getY() && b1.getYPos() <= r3.getY() + 80)
{
b1.setXVel(b1.getXVel() * -1);
ballBounces++;
playBounceSound();
}
}
}
}//end of checkBallRacketCollsion method
public void addScore()
{
if(b1.getXPos() < 1)
{
player2Score++;
playScoreSound();
b1.setXPos(350);
b1.setYPos(250);
b1.generateRandomXVelocity();
b1.generateRandomYVelocity();
this.pause();
this.resumeDelay();
b1.setSpeedIncreaseBoolean(true);
ballBounces = 0;
}//end of if
//If ball is behind racket end the round
else if(b1.getXPos() > 0 && b1.getXPos() < r1.getX() -10)
{
if(b1.getYPos() > r1.getY() && b1.getYPos() < (r1.getY() + 80))
{
player2Score++;
playScoreSound();
b1.setXPos(350);
b1.setYPos(250);
b1.generateRandomXVelocity();
b1.generateRandomYVelocity();
this.pause();
this.resumeDelay();
b1.setSpeedIncreaseBoolean(true);
ballBounces = 0;
}//end of if
}//end of else if
if(b1.getXPos() > 699)
{
playerScore++;
playScoreSound();
b1.setXPos(350);
b1.setYPos(250);
b1.generateRandomXVelocity();
b1.generateRandomYVelocity();
this.pause();
this.resumeDelay();
b1.setSpeedIncreaseBoolean(true);
ballBounces = 0;
}//end of if
//If ball is behind computer racket end the round
if(onePlayerGame)
{
if(b1.getXPos() > (r2.getX() + 10) && b1.getXPos() < 700)
{
if(b1.getYPos() > r2.getY() && b1.getYPos() < (r2.getY() + 80))
{
playerScore++;
playScoreSound();
b1.setXPos(350);
b1.setYPos(250);
b1.generateRandomXVelocity();
b1.generateRandomYVelocity();
this.pause();
this.resumeDelay();
b1.setSpeedIncreaseBoolean(true);
ballBounces = 0;
}//end of if
}//end of else if
}
if(twoPlayerGame)
{
if(b1.getXPos() > (r3.getX() + 10) && b1.getXPos() < 700)
{
if(b1.getYPos() > r3.getY() && b1.getYPos() < (r3.getY() + 80))
{
playerScore++;
playScoreSound();
b1.setXPos(350);
b1.setYPos(250);
b1.generateRandomXVelocity();
b1.generateRandomYVelocity();
this.pause();
this.resumeDelay();
b1.setSpeedIncreaseBoolean(true);
ballBounces = 0;
}
}
}
}//end of addScore method
public void pause()
{
this.timer.stop();
}//end of pause method
public void resumeDelay()
{
this.timer = new Timer(33,this);
timer.setInitialDelay(1500);
timer.start();
}//end of resume method
public void resume()
{
this.timer = new Timer(33,this);
timer.start();
}//end of resume
public void checkForWin()
{
if(playerScore == 5)
{
playerWin = true;
gameRunning = false;
}//end of if
else if(player2Score == 5)
{
player2Win = true;
gameRunning = false;
}//end of if
}//end of checkForWin method
public void endGameIfOver()
{
if(playerWin || player2Win)
{
this.timer.stop();
}//end of if
}//end of endGameIfOver method
public void playBounceSound()
{
try {
URL soundURL1 = getClass().getClassLoader().getResource("audio/pong sound effect 2.wav");
AudioInputStream ais = AudioSystem.getAudioInputStream(soundURL1);
Clip clip = AudioSystem.getClip();
clip.open(ais);
clip.start();
} catch(Exception ex) {
System.out.println("Error with playing bounce sound.");
ex.printStackTrace();
}
}//end of playBounceSound method
public void playScoreSound()
{
try
{
URL soundURL2 = getClass().getClassLoader().getResource("audio/Pong Sound effect 1.wav");
AudioInputStream ais2 = AudioSystem.getAudioInputStream(soundURL2);
Clip clip1 = AudioSystem.getClip();
clip1.open(ais2);
clip1.start();
}//end of try
catch(Exception e)
{
System.out.println("Error with playing score sound.");
e.printStackTrace();
}//end of catch
}//end of playScoreSound method
public void focusGained(FocusEvent e)
{
}
@Override
public void focusLost(FocusEvent e) {
this.requestFocusInWindow();
}
public void addKeyBindingPressed(int keyCode, String description, ActionListener action)
{
InputMap im = this.getInputMap(this.WHEN_IN_FOCUSED_WINDOW);
ActionMap am = this.getActionMap();
im.put(KeyStroke.getKeyStroke(keyCode, 0, false), description);
am.put(description, new AbstractAction()
{
@Override
public void actionPerformed(ActionEvent e)
{
action.actionPerformed(e);
}
});
}
public void addKeyBindingReleased(int keyCode1, String description1, ActionListener action1)
{
InputMap im1 = this.getInputMap(this.WHEN_IN_FOCUSED_WINDOW);
ActionMap am1 = this.getActionMap();
im1.put(KeyStroke.getKeyStroke(keyCode1,0,true), description1);
am1.put(description1, new AbstractAction()
{
@Override
public void actionPerformed(ActionEvent e)
{
action1.actionPerformed(e);
}
});
}
}//end of PongPanel class
球類
import javax.swing.*;
import java.awt.*;
import java.util.*;
public class Ball
{
private int x, y, xVel, yVel;
private boolean speedIncrease;
public Ball()
{
speedIncrease = true;
x = 350;
y = 250;
xVel = generateRandomXVelocity();
yVel = generateRandomYVelocity();
}//end of Ball constructor
public void paint(Graphics g)
{
g.setColor(Color.white);
g.fillOval(x,y,15,15);
}//end of paint method
public void move()
{
x += xVel;
y += yVel;
if(y < 10)
{
yVel *= -1;
}//end of if
else if(y > 460)
{
yVel *= -1;
}//end of if
}//end of move method
public int getXPos()
{
return x;
}//end of getXPos method
public int getYPos()
{
return y;
}//end of getYPos method
public void setXVel(int xVelocity)
{
xVel = xVelocity;
}//end of setXVel method
public int getXVel()
{
return xVel;
}//end of getXVel method
public int getYVel()
{
return yVel;
}//end of getYVel method
public int generateRandomXVelocity()
{
Random generator = new Random();
xVel = (generator.nextInt(2) + 6) * getRandomDirection();
return xVel;
}//end of generateRandomXVelocity method
public int generateRandomYVelocity()
{
Random generator = new Random();
yVel = generator.nextInt(2) + 6;
return yVel;
}//end of generateRandomYVelocity method
public int getRandomDirection()
{
Random generator = new Random();
int rand = generator.nextInt(2);
if(rand == 0)
{
return 1;
}//end of if
else
{
return -1;
}//end of else
}//end of getRandomDirection method
public void setXPos(int xPosition)
{
x = xPosition;
}//end of setXPos method
public void setYPos(int yPosition)
{
y = yPosition;
}//end of setYPos method
public void increaseSpeed(int ballBounces)
{
if(ballBounces == 3 && speedIncrease)
{
if(xVel > 0 && yVel > 0)
{
xVel+=3;
yVel+=3;
speedIncrease = false;
}//end of if
else if(xVel >0 && yVel < 0)
{
xVel+=3;
yVel-=3;
speedIncrease = false;
}//end of else if
else if(xVel <0 && yVel > 0)
{
xVel-=3;
yVel+=3;
speedIncrease = false;
}//end of else if
else
{
xVel-=3;
yVel-=3;
speedIncrease = false;
}//end of else
}//end of if
}//end of increaseSpeed
public void setSpeedIncreaseBoolean(boolean incomingInput)
{
speedIncrease = incomingInput;
}//end of setSpeedIncreaseBoolean method
}//end of class
球拍接口
import java.awt.*;
public interface Racket
{
public void paint(Graphics g);
public void move();
public int getY();
}//end of interface
HumanRacket類
import java.awt.*;
public class HumanRacket implements Racket
{
//Instance variables
private final double GRAVITY = 0.95;
private int x,y;
private double yVel;
private boolean upAccel, downAccel;
//Constructor
public HumanRacket(int xLoc, int yLoc)
{
x = xLoc;
y = yLoc;
yVel = 0;
upAccel = false;
downAccel = false;
}//end of constructor
//Methods
public void paint(Graphics g)
{
g.setColor(Color.white);
g.fillRect(x,y,1,80);
}//end of draw method
public void move()
{
if(upAccel)
{
yVel -= 4;
//Caps the speed at a certain point
if(yVel < -12)
{
yVel = -12;
}//end of if
}//end of if
else if(downAccel)
{
yVel += 4;
//Caps the speed at a certain point
if(yVel > 12)
{
yVel = 12;
}//end of if
}//end of else if
else if(!upAccel && !downAccel)
{
yVel *= GRAVITY;
}//end of else if
y += yVel;
//Prevents racket from leaving screen
if(y > 390)
{
y = 390;
}//end of if
else if(y < 0)
{
y = 0;
}//end of else if
}//end of move method
public void setUpAccel(boolean input)
{
upAccel = input;
}//end of setUpAccel method
public void setDownAccel(boolean input)
{
downAccel = input;
}//end of setDownAccel method
public int getY()
{
return y;
}//end of getY accessor method
public int getX()
{
return x;
}//end of getX accessor method
}//end of class
ComputerRacket類
import java.awt.*;
import javax.swing.*;
import java.util.*;
public class ComputerRacket implements Racket
{
private int x, y;
private double yVel;
private int HALFWAY_POINT = 350;
Random generator;
Ball b1;
public ComputerRacket(Ball whiteBall)
{
x = 660;
y = 210;
b1 = whiteBall;
generator = new Random();
yVel = 0;
}//end of constructor
public void paint(Graphics g)
{
g.setColor(Color.white);
//g.fillRect(x,y,20,80);
g.fillRect(x,y,1,80);
}//end of paint method
public void move()
{
this.setYVel(Math.abs(b1.getYVel()));
int randomelyGeneratedNum = generateRandomNumber();
if(b1.getXPos() >= HALFWAY_POINT)
{
if(randomelyGeneratedNum == 0 || randomelyGeneratedNum == 1 || randomelyGeneratedNum == 2)
{
if(b1.getYPos() > y + 40)
{
y += yVel;
}//end of if
else
{
y -= yVel;
}//end of else
}//end of if
else if(randomelyGeneratedNum == 3)//Overcorrect
{
if(b1.getYPos() > y + 40)
{
y += yVel + 2;
}//end of if
else
{
y -= yVel + 2;
}//end of else if
}//end of else if
else//Undercorrect
{
if(b1.getYPos() > y + 40)
{
y += yVel - 2;
}//end of if
else
{
y -= yVel - 2;
}//end of else
}//end of else
}//end of if
//Move around with ball but slightly slower
else
{
if(b1.getYPos() > y)
{
y += 3;
}//end of if
else
{
y -= 3;
}//end of else
}//end of else
//Prevents racket from leaving screen
if(y > 390)
{
y = 390;
}//end of if
else if(y < 0)
{
y = 0;
}//end of else if
}//end of move method
public int getY()
{
return y;
}//end of getY method
public int getX()
{
return x;
}//end of getX method
public int generateRandomNumber()
{
int randomNumber = 0;
randomNumber = generator.nextInt(5);
return randomNumber;
}//end of generateError
public void setYVel(int ballSpeed)
{
//yVel = ballSpeed - 0.9;
yVel = ballSpeed * 0.85;
}//end of setYVel method
}//end of class
這很奇怪。要重新創建該錯誤，您可以嘗試按住S並將播放器1一直髮送到屏幕底部。有時遊戲會出錯，玩家1和2變得無法控制，暫停按鈕停止工作。謝謝你的提示，但我會改變球，所以它不會下。 –
編輯：出於某種原因，這隻發生在我的Mac上，並出現在我的Windows筆記本電腦在有限的測試過程中罰款。 –
這將解釋它，因爲我有一臺Windows筆記本電腦，我正在測試它。 –