util.java

实现火星车,全部由java写成

package cn.nasa;

import java.util.HashMap;
import java.util.Map;

public class Util {
	private Direction N, S, W, E, X;
	public Coordinate coordinate;
	public Direction direction;
	private int max_x, max_y;
	Map<String, Direction> map = new HashMap<String, Direction>();

	Util(int x, int y, String dir, int max_x, int max_y) {
		coordinate = new Coordinate(x, y);

		N = new Direction();
		S = new Direction();
		W = new Direction();
		E = new Direction();

		N.setLeft(W);
		E.setLeft(N);
		W.setLeft(S);
		S.setLeft(E);

		N.setRight(E);
		E.setRight(S);
		W.setRight(N);
		S.setRight(W);

		N.setX_offset(0);
		S.setX_offset(0);
		W.setX_offset(-1);
		E.setX_offset(1);

		N.setY_offset(1);
		S.setY_offset(-1);
		W.setY_offset(0);
		E.setY_offset(0);

		map.put("N", N);
		map.put("S", S);
		map.put("W", W);
		map.put("E", E);

		direction = map.get(dir);

		this.max_x = max_x;
		this.max_y = max_y;
	}

	public boolean check() throws Exception {
		if (coordinate.getX_coordinate() < 0
				|| coordinate.getX_coordinate() >= max_x
				|| coordinate.getY_coordinate() < 0
				|| coordinate.getY_coordinate() >= max_y) {
			throw new Exception("error");
		}
		return true;
	}

}