在Java中搜索二维数组并返回Point2D对象

Question

我正在制作一件15件滑动瓷砖游戏，用户尝试在网格上按顺序排列瓷砖1-15。我被困在早期的部分，在用户输入平铺标签后，我们找到平板当前在平板上的位置。我的目标是搜索给定瓦片的瓦片所在的二维数组，然后，一旦找到，将Point2D对象的x和y值设置为找到的瓦片的行和列。我不确定我在哪里出错了。任何帮助？

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); 

和方法getTilePosition不得不返回值：

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); 
    } 

有了这个一起这是代码

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(); 
    } 
}