使用栈的迷宫算法java版代码

本文为大家分享了使用栈的迷宫算法java版，主要考察栈的使用，供大家参考，具体内容如下

主要思路如下：

 do {
  if(当前位置可通过) {
    标记此位置已走过;
    保存当前位置并入栈;
    if(当前位置为终点) {
      程序结束;
    }
    获取下一个位置;
  }
  else {
    if(栈非空) {
      出栈；
      while(当前位置方向为4且栈非空) {
        标记当前位置不可走;
        出栈;
      }
      if(当前位置的方向小于4) {
        方向+1;
        重新入栈;
        获取下一个位置;
      }
    }
  }
}
while (栈非空);

java代码如下：

import java.util.Stack;

public class Maze {

  // 栈
  private Stack<MazeNode> stack = new Stack<Maze.MazeNode>();
  // 迷宫
  private int[][] maze = {
    {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
    {1,0,1,0,0,0,1,1,0,0,0,1,1,1,1,1,1},
    {1,0,0,0,0,1,1,0,1,1,1,0,0,1,1,1,1},
    {1,0,1,1,0,0,0,0,1,1,1,1,0,0,1,1,1},
    {1,1,1,0,0,1,1,1,1,1,1,0,1,1,0,0,1},
    {1,1,0,0,1,0,0,1,0,1,1,1,1,1,1,1,1},
    {1,0,0,1,1,1,1,1,1,0,1,0,0,1,0,1,1},
    {1,0,0,1,1,1,1,1,1,0,1,0,0,1,0,1,1},
    {1,0,1,1,1,0,0,0,0,1,1,1,1,1,1,1,1},
    {1,0,0,1,1,0,1,1,0,1,1,1,1,1,0,1,1},
    {1,1,0,0,0,0,1,1,0,1,0,0,0,0,0,0,1},
    {1,1,0,1,1,1,1,1,0,0,0,1,1,1,1,0,1},
    {1,0,0,0,0,1,1,1,1,1,0,1,1,1,1,0,1},
    {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
  };
  // 标记路径是否已走过
  private int[][] mark = new int[MAZE_SIZE_X][MAZE_SIZE_Y];

  private static final int MAZE_SIZE_X = 14;
  private static final int MAZE_SIZE_Y = 17;
  private static final int END_X = 12;
  private static final int END_Y = 15;

  private void initMark() {
    for (int i = 0; i < MAZE_SIZE_X; i++) {
      for (int j = 0; j < MAZE_SIZE_Y; j++) {
        mark[i][j] = 0;
      }
    }
  }

  public void process() {
    initMark();
    Position curPos = new Position(1, 1);

    do {
      // 此路径可走
      if (maze[curPos.x][curPos.y] == 0 && mark[curPos.x][curPos.y] == 0) {
        mark[curPos.x][curPos.y] = 1;
        stack.push(new MazeNode(curPos, 1));
        // 已到终点
        if (curPos.x == END_X && curPos.y == END_Y) {
          return;
        }
        curPos = nextPos(curPos, stack.peek().direction);
      }
      // 走不通
      else {
        if (!stack.isEmpty()) {
          MazeNode curNode = stack.pop();
          while (curNode.direction == 4 && !stack.isEmpty()) {
            // 如果当前位置的4个方向都已试过，那么标记该位置不可走，并出栈
            mark[curNode.position.x][curNode.position.y] = 1;
            curNode = stack.pop();
          }
          if (curNode.direction < 4) {
            curNode.direction++;// 方向+1
            stack.push(curNode);// 重新入栈
            curPos = nextPos(curNode.position, curNode.direction);// 获取下一个位置
          }
        }
      }
    }
    while(!stack.isEmpty());
  }

  public void drawMaze() {
    for (int i = 0; i < maze.length; i++) {
      for (int j = 0; j < maze[0].length; j++) {
        System.out.print(maze[i][j]);
      }
      System.out.print("\n");
    }
    System.out.print("\n");
  }

  public void drawResult() {
    initMark();
    MazeNode node;
    while (!stack.isEmpty()) {
      node = stack.pop();
      mark[node.position.x][node.position.y] = 1;
    }
    for (int i = 0; i < mark.length; i++) {
      for (int j = 0; j < mark[0].length; j++) {
        System.out.print(mark[i][j]);
      }
      System.out.print("\n");
    }
    System.out.print("\n");
  }

  // 记录迷宫中的点的位置
  class Position {
    int x;
    int y;

    public Position(int x, int y) {
      this.x = x;
      this.y = y;
    }
  }

  // 栈中的结点
  class MazeNode {
    Position position;
    int direction;

    public MazeNode(Position pos) {
      this.position = pos;
    }
    public MazeNode(Position pos, int dir) {
      this.position = pos;
      this.direction = dir;
    }
  }

  // 下一个位置，从右开始，顺时针
  public Position nextPos(Position position, int direction) {
    Position newPosition = new Position(position.x, position.y);
    switch (direction) {
    case 1:
      newPosition.y += 1;
      break;
    case 2:
      newPosition.x += 1;
      break;
    case 3:
      newPosition.y -= 1;
      break;
    case 4:
      newPosition.x -= 1;
      break;
    default:
      break;
    }
    return newPosition;
  }

  public static void main(String[] args) {
    Maze maze = new Maze();
    maze.drawMaze();
    maze.process();
    maze.drawResult();
  }

}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。

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