我正在努力用Java编写一个简单的pacman游戏，但是在尝试实现主角移动控制的某些机制时我陷入了停顿。在几次尝试失败之后，我决定遵循这个解决方案：＆lt; How Do I Use KeyEventDispatcher＆GT;在将它应用到我的项目后，我仍然没有任何动作。似乎pacman的坐标根本没有变化。 示例答案代码可以正常工作。
我没有在下面的示例代码中包含类Map，因为它所做的只是读取用于绘制迷宫的地图txt文件，但它工作正常。
如果有人帮助过我，我将非常感激。
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.util.HashMap;
import javax.swing.*;
@SuppressWarnings("serial")
public class PacmanMaze extends JPanel {
private HashMap<Direction, Boolean> directionMap;
private Map m;
private Timer t;
private Pacman pac;
enum Direction {//specifying possible moves here
UP(KeyEvent.VK_UP, 0, -1), DOWN(KeyEvent.VK_DOWN, 0, 1),
LEFT(KeyEvent.VK_LEFT, -1, 0), RIGHT(KeyEvent.VK_RIGHT, 1, 0);
private int keyCode;
private int xDirection;
private int yDirection;
private Direction(int keyCode, int xDirection, int yDirection) {
this.keyCode = keyCode;
this.xDirection = xDirection;
this.yDirection = yDirection;
}
public int getKeyCode() {
return keyCode;
}
public int getXDirection() {
return xDirection;
}
public int getYDirection() {
return yDirection;
}
}
public PacmanMaze() {
setFocusable(true);
// requestFocus();
directionMap = new HashMap<Direction, Boolean>();
m=new Map();
pac=new Pacman();
for (Direction direction : Direction.values()) {
directionMap.put(direction, false);
}
setKeyBindings();
t=new Timer(25,new TimerListener());
t.start();
}
public void setKeyBindings()
{
InputMap inMap= getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
ActionMap actMap= getActionMap();
for (final Direction direction : Direction.values()) {
KeyStroke pressed = KeyStroke.getKeyStroke(direction.getKeyCode(), 0, false);
KeyStroke released = KeyStroke.getKeyStroke(direction.getKeyCode(), 0, true);
inMap.put(pressed, direction.toString() + "pressed");
inMap.put(released, direction.toString() + "released");
actMap.put(direction.toString() + "pressed", new AbstractAction() {
private static final long serialVersionUID = 1L;
@Override
public void actionPerformed(ActionEvent e) {
directionMap.put(direction, true);
}
});
actMap.put(direction.toString() + "released", new AbstractAction() {
private static final long serialVersionUID = 1L;
@Override
public void actionPerformed(ActionEvent e) {
directionMap.put(direction, false);
}
});
}
}
/**
* funkcja rysująca planszę gry na podstawie wczytanej wcześniej tablicy
* @param g -element grafiki
*/
public void paintComponent(Graphics g){
super.paintComponent(g);
//here the map is being drawn based on the input txt file with elements location (works properly)
Dimension d=this.getSize();
int szer= d.width;
int wys= d.height;
int cellWidth=szer/28;
int cellHeight=wys/31;
for(int y=0; y<31;++y)
{
for (int x=0; x<28; ++x){
//wall
if(m.getMap(x, y).equals("W"))
{
g.setColor(Color.PINK);
g.fillRect(x*cellWidth, y*cellHeight, cellWidth,cellHeight);
}
//ghosts were supposed to be here
else if(m.getMap(x,y).equals("G"))
{
g.setColor(Color.WHITE);
g.fillRect(x*cellWidth, y*cellHeight, cellWidth,cellHeight);
}
//pacman's initial position
else if(m.getMap(x,y).equals("P"))
{
pac.setc(x, y);
//g.drawImage(pac.getPacman(),x*cellWidth,y*cellHeight, cellWidth, cellHeight, null);
}
//permitted area for pacman's movement
else{
g.setColor(Color.WHITE);
g.fillRect(x*cellWidth, y*cellHeight, cellWidth,cellHeight);
//g.drawImage(m.getMelem(), x*30,y*30,null);
}
}
}
g.drawImage(pac.getPacman(),pac.getcX()*cellWidth, pac.getcY()*cellHeight, cellWidth, cellHeight, null);
}
private class TimerListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
boolean moved = false;
for (Direction direction : Direction.values()) {
if (directionMap.get(direction)) {
pac.makeMove(direction.getXDirection(),direction.getYDirection());
moved = true;
}
}
if (moved) {
repaint();
//repaint();
}
}
}
}
import java.awt.Image;
import java.awt.event.KeyEvent;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
public class Pacman {
private Image pacpac;
private int cX;//coordinates
private int cY;
public Pacman() {
try {
pacpac=ImageIO.read(new File("pac.jpg"));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// TODO Auto-generated constructor stub
}
public Image getPacman()
{
return pacpac;
}
public int getcY(){
return cY;
}
public int getcX(){
return cX;
}
public void setc(int nx, int ny){
cX=nx;
cY=ny;
}
//changing coordinates when pacman moved
public void makeMove(int x, int y)
{
this.cX+=x;
this.cY+=y;
}
}
import java.awt.*;
import javax.swing.JFrame;
/**
* Launching game
*
*/
public class Gamemode extends JFrame {
public Gamemode()
{
super("Board");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setPreferredSize(new Dimension(640,480));
PacmanMaze maze = new PacmanMaze();
add(maze);
setLocationRelativeTo(null);
pack();
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
Gamemode window=new Gamemode();
window.setVisible(true);
}
});
}
}