Question

我正在进行15件滑动平铺游戏，用户试图在网格上按顺序排列1-15块。我被困在早期部分，在用户输入瓷砖标签后，我们找到了瓷砖当前在电路板上的位置。我的目标是搜索给定图块的图块所在的2D数组，然后，一旦找到，将Point2D对象的x和y值设置为找到图块的行和列。我不确定我在哪里出错了。有什么帮助吗？

package tilegame;

import java.awt.geom.Point2D;
import java.util.Scanner;
public class TileGame 
{
    public TileGame()
    {
        GameBoard gameBoard = new GameBoard(); 
        Scanner user_input = new Scanner(System.in);
        int userTileNumber = 0;

        while (userTileNumber != -1)
        {
            System.out.print("Enter tile number: ");
            userTileNumber = user_input.nextInt(); 

            if (userTileNumber < 0) //terminates game if user enters -1
                break;
            else
                continue;
        }

        getTilePosition(userTileNumber);
    }

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

class GameBoard
{
    int [][] tiles = { {-1, -1, -1, -1, -1, -1},    //-1's represent the boundaries of the gameboard
                       {-1,  1,  2,  3,  4, -1},
                       {-1, 5, 6, 7, 8, -1},
                       {-1, 9, 10, 11, 12, -1},
                       {-1, 13, 14, 0, 15, -1},     //zero represents an empty space
                       {-1, -1, -1, -1, -1, -1} };

    public GameBoard()
    {
        printGameBoard(tiles);
    }

    private void printGameBoard(int[][] tiles)  //Prints current position of all the tiles on the board
    {
        for(int i = 0; i < tiles.length; i++)
        {
           for(int j = 0; j < tiles[0].length; j++)
           {
              System.out.printf("%5s ", tiles[i][j]);
           }
           System.out.println();
        }
    }

    public Point2D getTilePosition(int userTileNumber)
    {
        for(int i = 0; i < tiles.length; i++)
        {
           for(int j = 0; j < tiles[i].length; j++)
           {
               if (tiles[i][j] == userTileNumber)
               {
                   Point2D searchedTile = new Point2D(i,j);
                   return searchedTile;
               }
           }
        }

        System.out.print("Tile number: " + userTileNumber + "/nRow: " + i + "/nColumn: " + j);
    }
}

Answer 1

您的代码没问题。这部分代码必须升级

 while (userTileNumber != -1)
    {
        System.out.print("Enter tile number: ");
        userTileNumber = user_input.nextInt(); 

        if (userTileNumber < 0) //terminates game if user enters -1
            break;
        else
            continue;
    }

    getTilePosition(userTileNumber);

并且方法getTilePosition必须返回值：

 public Point2D getTilePosition(int userTileNumber)
    {
        for(int i = 0; i < tiles.length; i++)
        {
           for(int j = 0; j < tiles[i].length; j++)
           {
               if (tiles[i][j] == userTileNumber)
               {
                   Point2D searchedTile = new Point2D(i,j);
                   return searchedTile;
               }
           }
        }

        System.out.print("Tile number: " + userTileNumber + "/nRow: " + i + "/nColumn: " + j);
    }

这一切都是代码

import java.awt.geom.Point2D;
import java.util.Scanner;

public class TileGame 
{
    public static final int BOUNDARY = -1;
    public static final int EMPTY    =  0;
    public static final int QUIT     = -1;
    public static final int MIN_TILE =  1;
    public static final int MAX_TILE = 15;

    public static class GameBoard
    {
        int [][] tiles = {
            {BOUNDARY, BOUNDARY, BOUNDARY, BOUNDARY, BOUNDARY, BOUNDARY},
            {BOUNDARY, 1 ,  2,     3,  4, BOUNDARY},
            {BOUNDARY, 5 ,  6,     7,  8, BOUNDARY},
            {BOUNDARY, 9 , 10,    11, 12, BOUNDARY},
            {BOUNDARY, 13, 14, EMPTY, 15, BOUNDARY},
            {BOUNDARY, BOUNDARY, BOUNDARY, BOUNDARY, BOUNDARY, BOUNDARY} };

        public GameBoard()
        {
            printGameBoard(tiles);
        }

        public int[][] getTiles()
        {
            return tiles;
        }

        public void setTiles(int[][] tiles)
        {
            this.tiles = tiles;
        }

        public int getTile(int x, int y)
        {
            return getTiles()[x][y];
        }

        public int[] getRow(int i)
        {
            return getTiles()[i];
        }

        public static boolean isValidTile(int tile)
        {
            return MIN_TILE <= tile && tile <= MAX_TILE; 
        }

        private void printGameBoard(int[][] tiles)  //Prints current position of all the tiles on the board
        {
            for(int i = 0; i < tiles.length; i++)
            {
               for(int j = 0; j < tiles[0].length; j++)
               {
                  System.out.printf("%5s ", tiles[i][j]);
               }
               System.out.println();
            }
        }

        public Point2D getTilePosition(int userTileNumber)
        {
            Point2D searchedTile = null;
            for(int i = 0; i < getTiles().length && null == searchedTile ; i++)
            {
               for(int j = 0; j < getRow(i).length && null == searchedTile; j++)
               {
                   if (getTile(i,j) == userTileNumber)
                   {
                       searchedTile = new Point2D.Double(i,j);
                   }
               }
            }
            return searchedTile;
        }
    } 

    public TileGame()
    {
        GameBoard gameBoard = new GameBoard(); 
        Scanner user_input  = new Scanner(System.in);
        int userTileNumber  = 0;

        while (QUIT != userTileNumber)
        {
            System.out.print("Enter tile number: ");
            userTileNumber = user_input.nextInt();
            if (QUIT != userTileNumber && GameBoard.isValidTile(userTileNumber))
            {
                Point2D searchedTile = gameBoard.getTilePosition(userTileNumber);
                int x = (int)searchedTile.getX();
                int y = (int)searchedTile.getY();
                System.out.format("Tile's position (x,y) is (%d,%d).%n", x,y);
            }
        }
    }

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

搜索2D数组并在Java中返回Point2D对象

1 个答案: