I receive an error illegal start of expression starting at "public class Ingredient {". How would I fix this error?

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package SteppingStones;

/**

*

*

*

* @author jennifer.cook_snhu

*

*/

public class SteppingStone2_IngredientCalculator {

/**

*

* @param args the command line arguments

*

*/

public static void main(String[] args) {

public class Ingredient {

private String nameOfIngredient = "";

private int numberCups = 0;

private int numberCaloriesPerCup = 0;

public Ingredient(String nameOfIngredient, int numberCups,

int numberCaloriesPerCup) {

this.nameOfIngredient = nameOfIngredient;

this.numberCups = numberCups;

this.numberCaloriesPerCup = numberCaloriesPerCup;

}

public String getNameOfIngredient() {

return nameOfIngredient;

}

public int getNumberCups() {

return numberCups;

}

public int getNumberCaloriesPerCup() {

return numberCaloriesPerCup;

}

public double getTotalCalories() {

return numberCaloriesPerCup * numberCups;

}

@Override

public String toString() {

return numberCups + " cups of " + nameOfIngredient + ", total Calories: " + getTotalCalories();

}

}