gistfile1.txt

// Builder pattern
public class NutritionFacts {

    private final int servingSize;
    private final int servings;

    private final int calories;
    private final int fat;
    private final int sodium;
    private final int carbohydrate;


    public static class Builder {

        private final int servingSize;
        private final int servings;

        private int calories;
        private int fat;
        private int sodium;
        private int carbohydrate;

        public Builder(int servingSize, int servings) {
            this.servingSize = servingSize;
            this.servings = servings;
        }

        public Builder calories(int val) {
            calories = val;
            return this;
        }

        public Builder fat(int val) {
            fat = val;
            return this;
        }

        public Builder sodium(int val) {
            sodium = val;
            return this;
        }

        public Builder carbohydrate(int val) {
            carbohydrate = val;
            return this;
        }

        public NutritionFacts build() {
            return new NutritionFacts(this);
        }
    }

    private NutritionFacts(Builder builder) {
        servings = builder.servings;
        servingSize = builder.servingSize;

        calories = builder.calories;
        fat = builder.fat;
        sodium = builder.sodium;
        carbohydrate = builder.carbohydrate;
    }

    public static void main(String[] args) {
    // вот как выглядит код клиента
        NutritionFacts cocaCola = new Builder(340,11).calories(200).fat(30).carbohydrate(40).build();

    }
}