Hjälp med att fylla i några metoder

import java.util.Random;
     
    public class Queens {
           
            private Square[][] board;
            private int n;
           
            public Queens(int n)
            {
                    this.n = n;
                    board = new Square[n][n];
                    resetBoard();
                    setNewRandomPositioning();
            }
           
            private void resetBoard()
            {
                    board = new Square[][]; // Reset the board
            }
           
            public void setNewRandomPositioning()
            {
                    board = new Square[][]; //Reset the board
                    Random r = new Random();
                    n = r.nextInt(); // Fill with random
                    board = new Square[n][n]; // Fills the board with n queens
            }
           
           
            private int countQueens()
            {
                    int counter = n*n; // If you muliply n*n, you will get number of n in the board
                    return counter;        
            }
           
            private boolean isThreatened(int i, int j, int dx, int dy)
            {
                   
            }
     
    }

class mathClass
{
   // Addera två tal
   public static int add(int a, int b) {
       return a+b;
   }

   // Multiplicera två tal
   public static int mul(int a, int b) {
      return 666;
   }
}
   

x=i
y=j
while border not reached
   x+=dx
   y+=dy
   if occupied(x,y)
       return true
   else
       continue
return false