如何檢測數組

Question

好吧，是否有一種有效的方法可以通過使用KeyListener檢測您當前在哪個數組上？

我的代碼：http://www.javadan.pastebin.com/X68VyuGL

我想在這裏做的是看看當前瓦片我就被阻止。

謝謝。

Answer 1

我猜你不希望每次都遍歷整個矩陣，以找出關鍵事件後用戶所在的圖塊。爲什麼不保持播放器上最後位置的狀態，並在更新每個發生的關鍵事件時使用它？

好吧，你想如何做一些更多的信息，我將種子給你答案，你可以完成它：

public class tileGen extends Applet implements KeyListener { 

    Image[] tiles; // tile arrays 
    Image player; // player image 
    int x, y, px, py, tx, ty; // x tile - y tile // player x - player y // tile x - tile y 
    boolean left, right, down, up, canMove; // is true? 
    int[][] board; // row tiles for ultimate mapping experience! 
    final int NUM_TILES = 25; // how many tiles are we implementing? 
    Label lx, ly; // to see where we are! 
    public final int BLOCKED = 1; 

    int lastX, int lastY; // <=== new member fields to track last X and last Y 


    public void keyPressed(KeyEvent e) { 

    // UPDATE LAST X AND LAST Y IN THIS METHOD 
      if (e.getKeyCode() == KeyEvent.VK_LEFT) { 
        left = true; 
        px = px - 32; 
      } 
      if (e.getKeyCode() == KeyEvent.VK_RIGHT) { 
        right = true; 
        px = px + 32; 
      } 
      if (e.getKeyCode() == KeyEvent.VK_DOWN) { 
        down = true; 
        py = py + 32; 
      } 
      if (e.getKeyCode() == KeyEvent.VK_UP) { 
        up = true; 
        py = py - 32; 
      } 

      repaint(); 
    } 


}