//Original lab 3 text
import java.util.Scanner;
public class Main {

    public static void main(String[] args) {


        int magicSquare[][] = new int[4][4];
        int i, j, x, y;
        int total;
        int getNum;
        boolean valid = true;

        Scanner obj = new Scanner(System.in);
//User Enters values into array, second set of nested loops
// checks if the value is in the required range and not duplicating

        for (i = 0; i < 4; i++) {
            for (j = 0; j < 4; j++) {
                while (valid) {
                    System.out.println("Please fill in element: " + i + " " + j);
                   getNum = obj.nextInt();
                    for (x = 0; x < 4; x++) {
                        for (y = 0; y < 4; y++) {
                            if (magicSquare[x][y] = getNum;valid = false){
                                if (valid) (magicSquare[i][j] = getNum )

                            }
                        }
                    }
                }
            }
        }

/*
       for ( i = 0; i < 4; i++) {
            for ( j = 0; j < 4; j++) {
            		while (true){
            	 System.out.println("Please fill in element: " + i + " " + j);
            	 magicSquare[i][j] = obj.nextInt();
            		  for (x=0; x<4; x++){
            		  	for(y=0;y<4;y++){
            		  		if magicSquare[x][y] = magicSquare,
            		  		checkNum = magicSquare[i][j];
            		  			if (checkNum < 1 || checkNum > 16)
            		  		if magicSquare[x][y] = checkNum, valid = false
            		  			if(valid) magicSquare[i][j]=checkNum

            		  	}
            		}
				}
            }
          }
        }


this was just another Idea i was messing around with, I'm confused with the logic, haven't been able to compile :(
*/




                //Magic Square must = 34 in all directions
                //Math check

                // Find and check the sum for each row.

                for (i = 0; i < 4; i++) {

                    total = 0;
                    for (j = 0; j < 4; j++)
                        total += magicSquare[i][j];

                    if (total != 34)
                        System.out.println("Rows are not magical!");

                }
                // Find and check the sum for each column.

                for (j = 0; j < 4; j++) {
                    total = 0;
                    for (i = 0; i < 4; i++)
                        total += magicSquare[i][j];



                }

                // Check diagonals
                if (magicSquare[0][0] + magicSquare[1][1] + magicSquare[2][2] + magicSquare[3][3] != 34)
                    System.out.println("Diagonal Down is not magical!");
                if (magicSquare[3][0] + magicSquare[2][1] + magicSquare[1][2] + magicSquare[0][3] != 34)
                    System.out.println("Diagonal up is not magical!");


                //Print out 2D array 'magicalSquare'
                for (i = 0; i < 4; i++) {
                    for (j = 0; j < 4; j++) {
                        System.out.print(magicSquare[i][j] + "\t");
                    }
                    System.out.println();
                }

            }
        }