public void displayGrid() {
		displayEndBorder();
		
		for (int x=0; x < sudokuGrid.length; x++) {
			
			if (x%size == 0 && x != 0) {displayMiddleBorder();}
			for (int y=0; y < sudokuGrid[x].length; y++) {
				System.out.print((y==0 || y%this.size==0 ? "| " : ""));
				System.out.print(sudokuGrid[x][y] + " ");
				System.out.print((y==sudokuGrid[x].length-1 ? "|\n" : ""));
			}
		}
		
		displayEndBorder();
	}