23 lines
823 B
Java
23 lines
823 B
Java
import java.util.Arrays;
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import java.util.List;
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public class ShoppingCartFunctional {
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/**
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* Pure function that calculates the discount percentage based on the cart content.
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*
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* @param cart The list of items in the shopping cart.
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* @return 5 if a book is present, 0 otherwise.
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*/
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public static double getDiscountPercentage(List<String> cart) {
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return cart.stream().anyMatch(item -> item.toLowerCase().contains("book")) ? 5 : 0;
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}
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public static void main(String[] args) {
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List<String> cartWithBook = Arrays.asList("Apple", "Java Book");
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List<String> cartWithoutBook = Arrays.asList("Apple", "Orange");
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System.out.println("Discount with book: " + getDiscountPercentage(cartWithBook));
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System.out.println("Discount without book: " + getDiscountPercentage(cartWithoutBook));
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}
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}
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