Magic Square verification

P618.java

import java.util.Scanner;

public class P618
{

	public static void main(String[] args)
	{
			
		public static boolean equalityCheck(int[] n, int m) //I get the error here
		{
			/**
			
			checks array for equivalency
			@param flag catches != values in array n
			
			**/
			boolean flag = true;
			
			//verify all values are equal by checking against first value
			for (int i = 0; i < n.length; i++)
			{
			
				if ((n[0] != n[i]) || (m[i] != n[0])){flag = false;}
				
			}
			
			return flag;
		
		}
		
		
		/**public int arraySum(int[] n) //not sure if this is correct, actually this is totally pointless
		{
		
			int sum = 0;
			
			for (int i = 0, i < n.length, i++){sum = sum + n[i];}
			
			return sum;
			
		}
		
		**/
		public static boolean findNumber(int search, int[][] n)
		{
			/**
			finds a value in a two dimensional array
			param @search value to be found
			param @flag truth value to be returned
			param @n array being searched 
			**/
			boolean flag = false;
			
			for (int i = 0; i < 4; i++)
			{
				
				for (int j = 0; j < 4; j++)
				{
				
					if (search = n[i][i]){flag = true;}
				
				}
			
			}
		
		}	
		
		
		int[] square = new int[4][4];
		Scanner in = new Scanner(System.in);
		
		int[] rowTotals = new int[4];
		int[] columnTotals = new int[4];
				
		int counter = 1;
		
		System.out.println("Let's make a magic square!  Please enter numbers 1 through 16 in a random order.");
		
		for (int i = 0; i < 4; i++) //row
		{
		
			for (int j = 0; j < 4; i++) // column
			{
			  
				System.out.println("Input value " + counter + ": ");
				square[i][j] = in.nextInt();
				
				counter++;
				
				rowTotals[i] = rowTotals[i] + square[i][j];
				columnTotals[j] = columnTotals[j] + square[i][j];
							
			}
		
		}
		
		int[] leftRightDiagonal = {square[0][0], square[1][1], square[2][2], square[3][3]};
		int[] rightLeftDiagonal = {square[0][3], square[1][2], square[2][1], square[3][0]};
		
		boolean rowColumnCheck = equalityCheck(rowTotals, columnTotals);
		boolean diagonalCheck = equalityCheck(leftRightDiagonal, rightLeftDiagonal);
		boolean crossCheck = equalityCheck(rowTotals, leftRightDiagonal);
		
		int findThis = 1;
		
		
		boolean allNumbers = true;
		
		for (int i = 1; i < 17; i++) //checks for all integers 1 through 16
		{
					
			boolean check = findNumber(i, square);
			if (check == false){allNumbers = false;}
			
		}
		
		
		if (allNumbers && rowColumnCheck && diagonalCheck && crossCheck){System.out.println("This is a magic square!");}
		else{System.out.println("This isn't a magic square.");}
		
	}
		
}