从两个两个网格中查找数字的平均值

Question

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
import java.util.ArrayList;

public class CastleDefense {

// This is a global variable because both the public CastleDefense and main are using it 
double [][] grid;
public CastleDefense(int numRows, int numCols, Double[] scan) {
    int k = 0;
    grid = new double[numRows][numCols];
//loop that goes across the grid
  for (int r = 0; r<numRows; r++){
      if (numRows%2==0){
//stores the position of the grid, where we are. (k) ex. second row, we are on the first row and place          
          for (int g = 0; g<numCols; g++){
              grid [r][g] = scan[k];
          k++;
          }   
      }
      else{
          for (int j = numCols; j>=0;j--){
          grid [r][j] = scan[k];
          k++;              
      }
    }        
  }

}

public void findWeakest(){

}

public double getAverage(int startRow, int startCols, int endRow, int endCol){
    double average = 0.0;

    return average;        
}



public static void main(String[] args) throws FileNotFoundException {
    int rows = 0;
    int cols = 0;
    Scanner input = new Scanner(new File("data.in"));
//Making the array list to hold the doules in it
    ArrayList<Double> arr = new ArrayList<>();
//Switching my aray list to a regular array to pass it to the constructor
    Double[] scan = new Double[arr.size()];
//loop to enter the doubles in the list
    while (input.hasNextDouble()) {
        arr.add(input.nextDouble());
        //System.out.println(arr.get(arr.size() - 1));
    }
//loop to calculate the number of rows and columns
    int i = (int) Math.sqrt(scan.length);
    while (i>0){
    if (scan.length % i == 0){
        rows = i;
        cols = scan.length/i;           
    }
    else
    i--;
}
//passing the values to the constructor
    CastleDefense pyramid = new CastleDefense (rows,cols, scan); 
}
}

这是我到目前为止的代码。我的目标是让程序从数字列表中读取（在data.in中）将其存储在一个数组中，然后制作一个网格（最接近最佳平方，因此3x4而非1x12）将这些数字从数组插入网格在第一行从左到右阅读，然后在第二行从右到左阅读，依此类推第四行。然后从网格中取出第一个2x2并添加找到平均值的所有数字，并输出最弱的2x2和平均值。我目前仍然坚持从网格中获取数字的平均值，并找到最弱的数字。