Question

The FoodItem.java file defines a class called FoodItem that contains instance variables for name (String) and calories (int), along with get/set methods for both. Implement the methods in the Meal class found in Meal.java

public class FoodItem{
private String name;
private int calories;
  
public FoodItem(String iName, int iCals){
name = iName;
calories = iCals;
}
  
public void setName(String newName){
name = newName;
}
  
public void setCalories(int newCals){
calories = newCals;
}
  
public int getCalories(){
return calories;
}
  
public String getName(){
return name;
}
}

//Represents a meal made up of up to maxItems food items
public class Meal{
private FoodItem[] items; //stores all of the food items that are in the meal
private static final int maxItems = 25;
  
//Constructor should initialize all instance variables
public Meal(){

}
  
//Add the given food item to the items array, if there is still room
//If there is no room, do nothing.
public void addFoodItem(FoodItem item){
  
}
  
//Return the FoodItem in the items array that has the largest number of calories
//If there are ties, you may return any of the largest
public FoodItem mostCalories(){
return null; //included so code will compile
}
  
//Computes and returns the total number of calories of all food items in this meal
public int calculateTotalCalories(){
return -1; //included so code will compile
}
}

Answer 1

//Represents a meal made up of up to maxItems food items
public class Meal {
    private FoodItem[] items; //stores all of the food items that are in the meal
    private static final int maxItems = 25;
    private int count;

    //Constructor should initialize all instance variables
    public Meal() {
        items = new FoodItem[maxItems];
        count = 0;
    }

    //Add the given food item to the items array, if there is still room
//If there is no room, do nothing.
    public void addFoodItem(FoodItem item) {
        if (count < items.length) {
            items[count++] = item;
        }
    }

    //Return the FoodItem in the items array that has the largest number of calories
//If there are ties, you may return any of the largest
    public FoodItem mostCalories() {
        if (count == 0)
            return null;
        FoodItem maxItem = items[0];
        for (int i = 0; i < count; i++) {
            if (items[i].getCalories() > maxItem.getCalories()) {
                maxItem = items[i];
            }
        }
        return maxItem;
    }

    //Computes and returns the total number of calories of all food items in this meal
    public int calculateTotalCalories() {
        int total = 0;
        for (int i = 0; i < count; i++) {
            total += items[i].getCalories();
        }
        return total;
    }
}