public World(int size, double foodProb, double grazerProb) {

        char[][] grid;
        grid = new char[size][size];

        foodProb = Math.random();
        grazerProb = Math.random();

        for (int row = 0; row < grid.length; row++) {
            for (int col = 0; col < grid.length; col++) {
                if(grid[row][col] == foodProb) {
                    System.out.print(".");
                }
                if(grid[row][col] == grazerProb) {
                    System.out.print("@");
                } else {
                    System.out.print(" ");
                }
            }
        }
        System.out.println(grid);
    }