room.java

来自「一个用JAVA语言编写的迷宫程序,可以实现迷宫的行走」· Java 代码 · 共 57 行

/**
 * 
 */
package org.freemind.maze2d;

/**
 * @author Jerric
 * @created Feb 9, 2006
 */
public class Room {

    private static final int MASK_EAST = 1;
    private static final int MASK_NORTH = 2;
    private static final int MASK_WEST = 4;
    private static final int MASK_SOUTH = 8;

    private byte flag;

    /**
     * 
     */
    public Room() {
        flag = 0;
    }

    public boolean isNorthOpen() {
        return ((flag & MASK_NORTH) != 0);
    }

    public boolean isSouthOpen() {
        return ((flag & MASK_SOUTH) != 0);
    }

    public boolean isEastOpen() {
        return ((flag & MASK_EAST) != 0);
    }

    public boolean isWestOpen() {
        return ((flag & MASK_WEST) != 0);
    }

    void openNorth() {
        flag |= MASK_NORTH;
    }

    void openSouth() {
        flag |= MASK_SOUTH;
    }

    void openEast() {
        flag |= MASK_EAST;
    }

    void openWest() {
        flag |= MASK_WEST;
    }
}