CODEWITHSUNDEEP
java
Kristofer Ard
Kristofer Ard

Reputation: 133

error: incompatible types: possible lossy conversion from double to int

public class FoodItem {

 private String name;
 private int calories;
 private int fatGrams;
 private int caloriesFromFat;

 public FoodItem(String n, int cal, int fat) {
    name = n;
    calories = cal;
    fatGrams = fat;  
 }

 public void setName(String n) {
    name = n;
 }

 public void setCalories(int cal) {
    calories = cal; 
 }

 public void setFatGrams(int fat) {
    fatGrams = fat;  
 }

 public String getName() {
    return name;
 }

 public int getCalories() {
    return calories;
 }

 public int getFatGrams() {
    return fatGrams; 
 }

 public int getCaloriesFromFat() {
    return (fatGrams * 9.0); 
 }

 public int getPercentFat() {
    return (caloriesFromFat / calories);
 }

 // Ignore for now
 public String toString() {
    return name + calories + fatGrams;
 }
}

My instructions are to "Include a method named caloriesFromFat which returns an integer with the number of calories that fat contributes to the total calories (fat grams * 9.0).", but when I try to compile I get the above error. I have no clue what I have wrong.

Upvotes: 0

Views: 1036

Answers (1)

rgettman
rgettman

Reputation: 178243

You've used a double literal 9.0 in your multiplication in getCaloriesFromFat. Because of this, fatGrams is promoted to a double for the multiplication, and the product is a double. However, you have that method returning an int.

You can use an int literal (9, no decimal point) or you can have getCaloriesFromFat return a double instead of an int. Since you're just multiplying by 9, I would use the int literal 9.

Upvotes: 1

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