Java简易撞鬼游戏demo

9*9方格内两点随机行走，相遇则停止。

 public class 撞鬼 {

     public static int length = 9;
     public static char[][] matrix = new char[length][length];
     public static int firstx = length - length;
     public static int firsty = length - length;
     public static int secondx = length - 1;
     public static int secondy = length - 1;

     public static void main(String[] args) {

         final int timeInterval = 333;

         for(int i=length - length;i<length;i++){
             for(int j=length - length;j<length;j++){
                 matrix[i][j] = '○';
                 if((i==j&&i==(length - length))||(i==j&&i==(length-1))){
                     matrix[i][j] = '●';
                 }
             }
         }

         Runnable runnable = new Runnable() {
             public void run() {
                 while (true) {
                     try {
                         for(int i=length - length;i<length;i++){
                             for(int j=length - length;j<length;j++){
                                 System.out.print(matrix[i][j]);
                                 System.out.print(' ');
                             }
                             System.out.println();
                         }
                         if(firstx==secondx&&firsty==secondy){
                             break;
                         }
                         changePosition();
                         Thread.sleep(timeInterval);
                     } catch (InterruptedException e) {
                         e.printStackTrace();
                     }
                 }
             }
         };
         Thread thread = new Thread(runnable);
         thread.start();

     }

     public static void changePosition(){
         double randomfirst = Math.random();
         double randomsecond = Math.random();
         if(randomfirst<0.25){
             if(firstx>length - length){
                 matrix[firstx--][firsty] = '○';
                 matrix[firstx][firsty] = '●';
             }
         }else if(randomfirst<0.50){
             if(firstx<length - 1){
                 matrix[firstx++][firsty] = '○';
                 matrix[firstx][firsty] = '●';
             }
         }else if(randomfirst<0.75){
             if(firsty>length - length){
                 matrix[firstx][firsty--] = '○';
                 matrix[firstx][firsty] = '●';
             }
         }else{
             if(firsty<length - 1){
                 matrix[firstx][firsty++] = '○';
                 matrix[firstx][firsty] = '●';
             }
         }
         if(randomsecond<0.25){
             if(secondx>length - length){
                 matrix[secondx--][secondy] = '○';
                 matrix[secondx][secondy] = '●';
             }
         }else if(randomsecond<0.50){
             if(secondx<length - 1){
                 matrix[secondx++][secondy] = '○';
                 matrix[secondx][secondy] = '●';
             }
         }else if(randomsecond<0.75){
             if(secondy>length - length){
                 matrix[secondx][secondy--] = '○';
                 matrix[secondx][secondy] = '●';
             }
         }else{
             if(secondy<length - 1){
                 matrix[secondx][secondy++] = '○';
                 matrix[secondx][secondy] = '●';
             }
         }
     }

 }