帶鍵綁定的執行緒
多執行緒不是必需的，除非您希望遊戲是多執行緒的。
問題是，兩個玩家可以按不同的鍵嗎？如果是這樣，您可以使用布林值來指示按鍵是否按下，並在釋放按鍵時重設標誌。
在您的遊戲邏輯中，檢查布林值的狀態並採取適當的行動。請參閱以下範例，其中兩個槳都可以獨立移動：
[槳獨立移動的圖像]
以下是範例程式碼：
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class GameLogic extends JFrame
{
public GameLogic()
{
initComponents();
}
private void initComponents()
{
JFrame frame = new JFrame("Game Test");
//create the gamepanel
final GamePanel gp = new GamePanel(600, 500);
//create panel to hold buttons to start, pause
JPanel buttonPanel = new JPanel();
final JButton startButton = new JButton("Start");
final JButton pauseButton = new JButton("Pause");
final JButton resetButton = new JButton("Reset");
pauseButton.setEnabled(false);
resetButton.setEnabled(false);
//add listeners to buttons
startButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
gp.clearEntities();
addEntityToPanel(gp);
startButton.setEnabled(false);
pauseButton.setEnabled(true);
resetButton.setEnabled(true);
//start the game loop which will repaint the screen
runGameLoop(gp);
}
});
//create and add keybindings for game panel
GameKeyBindings gameKeyBindings = new GameKeyBindings(gp, player1Entity, player2Entity);
pauseButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
boolean b = GamePanel.paused.get();
GamePanel.paused.set(!b);//set it to the opposite of what it was i.e paused to unpaused and vice versa
if (pauseButton.getText().equals("Pause")) {
pauseButton.setText("Un-pause");
} else {
pauseButton.setText("Pause");
}
}
});
resetButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
resetGame(gp);
}
});
buttonPanel.add(startButton);
buttonPanel.add(pauseButton);
buttonPanel.add(resetButton);
frame.add(gp);
frame.add(buttonPanel, BorderLayout.SOUTH);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
//Simply used for testing (to simulate sprites) can create different colored images
public static BufferedImage createColouredImage(String color, int w, int h, boolean circular) {
BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = img.createGraphics();
switch (color.toLowerCase()) {
case "green":
g2.setColor(Color.GREEN);
break;
case "magenta":
g2.setColor(Color.MAGENTA);
break;
case "red":
g2.setColor(Color.RED);
break;
case "yellow":
g2.setColor(Color.YELLOW);
break;
case "blue":
g2.setColor(Color.BLUE);
break;
case "orange":
g2.setColor(Color.ORANGE);
break;
case "cyan":
g2.setColor(Color.CYAN);
break;
case "gray":
g2.setColor(Color.GRAY);
break;
default:
g2.setColor(Color.WHITE);
break;
}
if (!circular) {
g2.fillRect(0, 0, img.getWidth(), img.getHeight());
} else {
g2.fillOval(0, 0, img.getWidth(), img.getHeight());
}
g2.dispose();
return img;
}
private void runGameLoop(final GamePanel gp) {
Thread loop = new Thread(new Runnable() {
@Override
public void run() {
gp.gameLoop();
}
});
loop.start();
}
private void resetGame(GamePanel gp) {
gp.reset();
gp.clearEntities();
addEntityToPanel(gp);
gp.repaint();
}
void addEntityToPanel(GamePanel gp){
ArrayList<BufferedImage> ballEntityImages = new ArrayList<>();
ArrayList<Long> ballEntityTimings = new ArrayList<>();
ballEntityImages.add(createColouredImage("white", 50, 50, true));
ballEntityTimings.add(500l);
Entity ballEntity = new Entity(gp.getWidth() / 2, gp.getHeight() / 2, ballEntityImages, ballEntityTimings);
ballEntity.RIGHT = true;
//create images for entities
ArrayList<BufferedImage> advEntityImages = new ArrayList<>();
ArrayList<Long> advEntityTimings = new ArrayList<>();
advEntityImages.add(createColouredImage("orange", 10, 100, false));
advEntityTimings.add(500l);
advEntityImages.add(createColouredImage("blue", 10, 100, false));
advEntityTimings.add(500l);
//create entities
AdvancedSpritesEntity player1Entity = new AdvancedSpritesEntity(0, 100, advEntityImages, advEntityTimings);
ArrayList<BufferedImage> entityImages = new ArrayList<>();
ArrayList<Long> entityTimings = new ArrayList<>();
entityImages.add(createColouredImage("red", 10, 100, false));
entityTimings.add(500l);//as its the only image it doesnt really matter what time we put we could use 0l
//entityImages.add(createColouredImage("magenta", 100, 100));
//entityTimings.add(500l);
Entity player2Entity = new Entity(gp.getWidth() - 10, 200, entityImages, entityTimings);
gp.addEntity(player1Entity);
gp.addEntity(player2Entity);//just a standing still Entity for testing
gp.addEntity(ballEntity);//just a standing still Entity for testing
}
//Code starts here
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
try {//attempt to set look and feel to nimbus Java 7 and up
for (UIManager.LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
GameLogic gameLogic = new GameLogic();
}
});
}
}
class GameKeyBindings {
public GameKeyBindings(JComponent gp, final Entity entity, final Entity entity2) {
gp.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(KeyEvent.VK_W, 0, false), "W pressed");
gp.getActionMap().put("W pressed", new AbstractAction() {
@Override
public void actionPerformed(ActionEvent ae) {
entity.UP=true;
}
});
gp.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(KeyEvent.VK_S, 0, false), "S pressed");
gp.getActionMap().put("S pressed", new AbstractAction() {
@Override
public void actionPerformed(ActionEvent ae) {
entity.DOWN=true;
}
});
gp.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0, false), "up pressed");
gp.getActionMap().put("up pressed", new AbstractAction() {
@Override以上是如何使用按鍵綁定在 Java 遊戲中同時處理多個按鍵？的詳細內容。更多資訊請關注PHP中文網其他相關文章！
