Question

所以基本上我正在使用 javafx 创建一个游戏板，我有一个单元格状态类，此时根据单元格中的内容返回一个字符值。所以基本上如果单元格是空的，它返回' '，如果我有一个玩家，它返回'@'，依此类推不同的单元状态。我只是想知道如何返回图像而不是字符。

public class Cell {

    CellState cellState;

    public Cell(CellState newCellState) {
        cellState = newCellState;
    }

    public CellState getCellState() {
        return cellState;
    }

    public void setCellState(CellState newCellState)
    {
        cellState = newCellState;
    }

    public char displayCellState()
    {
        return getCellStateCharacter(cellState);
    }

    public char getCellStateCharacter(CellState newCellState)
    {
        switch (newCellState)
        {
        case EMPTY:
            return ' ';
        case PLAYER:
            return '@';
        case MONSTER:
            return '&';
        case POISON:
            return '*';
        case BLOCKED:
            return '#';
        default:
            return ' ';
        }

    }


 }

MY CELL STATE CLASS

    public enum CellState
    {
    EMPTY,
    PLAYER,
    MONSTER,
    POISON,
    BLOCKED
    };



public class GameBoard {
static final int BOARD_WIDTH = 10;
static final int BOARD_HEIGHT = 10;

Cell[][] boardCells;
int width;
int height;

public GameBoard()
{
    boardCells = new Cell[BOARD_WIDTH][BOARD_HEIGHT];

    width = BOARD_WIDTH;
    height = BOARD_HEIGHT;
}

public void initGameBoard()
{
    for (int i = 0; i < height; ++i)
    {
        for (int j = 0; j < width; ++j)
        {
            boardCells[j][i] = new Cell(CellState.EMPTY);
        }
    }

    boardCells[0][0].setCellState(CellState.PLAYER);

    boardCells[2][4].setCellState(CellState.MONSTER);
    boardCells[2][6].setCellState(CellState.MONSTER);

    boardCells[7][8].setCellState(CellState.POISON);

    boardCells[5][0].setCellState(CellState.BLOCKED);
    boardCells[5][1].setCellState(CellState.BLOCKED);
    boardCells[5][2].setCellState(CellState.BLOCKED);
    boardCells[5][3].setCellState(CellState.BLOCKED);

}

public String displayBoard()
{
    String output = "";
    output +="| |";
    for (int i = 0; i < width; ++i)
    {
        output +=i + "|";
    }
    output +="\n";

    for (int j = 0; j < height; ++j)
    {
        output +="|" + j + "|";
        for (int k = 0; k < width; ++k)
        {
            output +=boardCells[k][j].displayCellState() + "|";
        }
        output +="\n";

    }

    return output;
}

}

Answer 1

enums are classes too。因此，当CellState枚举表示您的状态时，最好将给定状态的所有相关信息直接编码到CellState类中。那将包括角色和图像。

import javafx.scene.image.Image;

public enum CellState {
   EMPTY(' ', "empty.png"),
   PLAYER('@', "player.png"),
   MONSTER('&', "monster.png"),
   POISON('*', "poison.png"),
   BLOCKED('#', "blocked.png");

   private final char cellChar;
   private final Image cellImage;

   CellState(char cellChar, String imageLoc) {
     this.cellChar = cellChar;
     this.image = new Image(imageLoc);
   }

   public char getChar() {
     return cellChar;
   }

   public Image getImage() {
     return cellImage;
   }

   @Override
   public String toString() {
     return Character.toString(cellChar);
   }
}

然后您像以前一样保留您的单元格API，但是您可以放弃getCellStateCharacter()方法并将其用法替换为cell.getCellState().getChar()，对于图像类似，它将是cell.getCellState().getImage()。

要了解Image构造函数从何处获取图像，请参阅：

Where does javafx.scene.image.Image("flower.png") look for flower.png?

如果您想从类路径中获取图像（例如，当图像打包在jar中时），您可以使用：

new Image(getClass().getResourceAsStream("player.png"))

以上内容将从CellState.class文件所在的类路径中的同一文件夹中获取图像。

Answer 2

我猜你可以使用字节数组进行图像返回，然后在屏幕上显示

如何返回图像

2 个答案: