java - 迷宫游戏编程

Question

这是我的简单迷宫游戏代码。它正在编译，并且正在创建 MazeGame.java 和 Board.java 的类文件，但没有创建 Player.java 和 Map.java 的类文件。该代码编译无错误，但未运行。请帮帮我。

//MazeGame.java
package mygame;

import javax.swing.*;

public class MazeGame {
    public static void main(String[] args) {
        new MazeGame();
    }

    public MazeGame() {
        JFrame f= new JFrame();
        f.setTitle("Maze Game");
        f.setSize(450,450);
        f.setLocationRelativeTo(null);
        f.add(new Board());
        f.setVisible(true);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}   



//Board.java
package mygame;

import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
import java.awt.*;

public class Board extends JPanel implements ActionListener {
    private Timer timer;
    private Map m;
    private Player p;
    private boolean win=false;
    private String Message="";
    private Font font = new Font("Comic Sans",Font.BOLD,50);

    public Board() {
        m = new Map();
        p = new Player();

        addKeyListener(new Al());
        setFocusable(true);

        timer = new Timer(25,this);
        timer.start();
    }

    public void paint(Graphics g)
    {
        super.paint(g);

        if(!win)
        {
            for(int y=0; y<14; y++) {
               for(int x=0; x<14; x++) {
                  if(m.getMap(x,y).equals("f")) {
                g.drawImage(m.getFinish(),x*32,y*32,null);
                  }
                              if(m.getMap(x,y).equals("g")) {
                g.drawImage(m.getGrass(),x*32,y*32,null);
                  }
                  if(m.getMap(x,y).equals("w")) {
                g.drawImage(m.getWall(),x*32,y*32,null);
                  } 
               }
            }
            g.drawImage(p.getPlayer(),p.getTileX()*32,p.getTileY()*32,null);
        }

        if(win)
        {
            g.setColor(Color.BLUE);
            g.setFont(font);
            g.drawString(Message,100,300);
        }
    }

    public class Al extends KeyAdapter {
        public void keyPressed(KeyEvent e) {
            int keyCode = e.getKeyCode();
            if((keyCode==KeyEvent.VK_W) || (keyCode==KeyEvent.VK_UP)) {
                if(!(m.getMap(p.getTileX(),p.getTileY()-1).equals("w"))) {
                    p.move(0,-1);
                }
            }
            if((keyCode==KeyEvent.VK_S) || (keyCode==KeyEvent.VK_DOWN)) {
                if(!(m.getMap(p.getTileX(),p.getTileY()+1).equals("w"))) {
                    p.move(0,1);
                }
            }
            if((keyCode==KeyEvent.VK_A) || (keyCode==KeyEvent.VK_LEFT)) {
                if(!(m.getMap(p.getTileX(),p.getTileY()-1).equals("w"))) {
                    p.move(-1,0);
                }
            }
            if((keyCode==KeyEvent.VK_D) || (keyCode==KeyEvent.VK_RIGHT)) {
                if(!(m.getMap(p.getTileX(),p.getTileY()-1).equals("w"))) {
                    p.move(1,0);
                }
            }
        }
    }

    public void actionPerformed(ActionEvent e) {
        if(m.getMap(p.getTileX(),p.getTileY()).equals("f")) {
            Message = "WINNER!!!";
            win = true;
        }
        repaint();
    }
}       



//Map.java
package mygame;

import java.util.*;
import java.io.*;
import java.awt.*;
import java.awt.*;

public class Map {
    private Scanner s;
    private String Map[] = new String[14];
    private Image grass,wall,finish;

    public Map() {
        ImageIcon img = new ImageIcon("G://sonali_java//mygame//grass.png");
        grass = img.getImage();
        img = new ImageIcon("G://sonali_java//mygame//wall.png");
        wall = img.getImage();
        img = new ImageIcon("G://sonali_java//mygame//finish.png");
        finish = img.getImage();

        openFile();
        readFile();
        closeFile();
    }

    public String getMap(int x,int y) {
        String index = Map[y].substring(x,x+1);
        return index;
    }

    public Image getGrass() {
        return grass;
    }
    public Image getWall() {
        return wall;
    }
    public Image getFinish() {
        return finish;
    }

    public void openFile() {
        try {
            s= new Scanner(new File("G://sonali_java//mygame//Map.txt"));
        }
        catch(Exception e) {
            System.out.println("Error Loading File!!!!");
        }
    }

    public void readFile() {
        while(s.hasNext()) {
            for(int i=0; i<14; i++) {
                Map[i] = s.next();
            }
        }
    }

    public void closeFile() {
        s.close();
    }
}



//Player.java
package mygame;

import java.awt.*;

public class Player {
    private int tileX,tileY;
    private Image player;

    public Player() {
        tileX=1;
        tileY=1;
        ImageIcon img = new ImageIcon("G://sonali_java//mygane//object.png");
        player = img.getImage();
    }

    public Image getPlayer() {
        return player;
    }

    public int getTileX() {
        return tileX;
    }

    public int getTileY() {
        return tileY;
    }

    public void move(int dx, int dy) {
        tileX += dx;
        tileY += dy;
    }
}

Answer 1

我不想生气，但你正在定义不同的文件夹位置

在某些地方“G://sonali_java//mygane//object.png”，检查“mygaNe”

在某些地方“G://sonali_java//mygame//Map.txt”，选中“mygaMe”

您确定加载时不会抛出 NullPointerException 吗？