food.java

来自「j2me源代码」· Java 代码 · 共 50 行

package snake;

import javax.microedition.lcdui.Graphics;

public class Food {
  SnakeCanvas canvas;
  private int xCell;  //food的x坐标，以小方格为单位
  private int yCell;  //food的y坐标，以小方格为单位

  public Food(SnakeCanvas sc) {
    canvas = sc;
    createFood();
  }

  /**
   * createFood
   */
  public void createFood() {
    xCell = (int)(System.currentTimeMillis() % canvas.getXCellNum());
    yCell = (int)(System.currentTimeMillis() % canvas.getYCellNum());
  }

  /**
   * 绘制函数
   * @param g Graphics
   */
  public void paint(Graphics g){
    g.setColor(SnakeCanvas.FOOD_COLOR);
    int x = xCell * SnakeCanvas.CELL_SIZE;
    int y = yCell * SnakeCanvas.CELL_SIZE;
    g.fillRect(x+1, y+1, SnakeCanvas.CELL_SIZE-1, SnakeCanvas.CELL_SIZE-1);
  }

  /**
   * 返回food的x坐标，以小方格为单位
   * @return int
   */
  public int getX(){
    return xCell;
  }

  /**
   * 返回food的y坐标，以小方格为单位
   * @return int
   */
  public int getY(){
    return yCell;
  }
}