FizzBuzz Java8対応版

FizzBuzz.java

import java.util.stream.IntStream;

/**
 *
 * @author koduki
 */
public class FizzBuzz {

    public static void main(String[] args) {
        fizzBuzzWithOldStyle();
        fizzBuzzWithNewStyle();
    }

    /**
     * Java 8 Style.
     */
    public static void fizzBuzzWithNewStyle() {
        //fizzBuzzWithOldStyle();
        IntStream.rangeClosed(1, 100).boxed()
                .map(n
                        -> ((n % 3 == 0) && (n % 5 == 0)) ? "FizzBuzz"
                        : (n % 3 == 0) ? "Fizz"
                        : (n % 5 == 0) ? "Buzz"
                        : n.toString())
                .forEach((x) -> System.out.println(x));
    }

    /**
     * Before Java 7 Style.
     */
    public static void fizzBuzzWithOldStyle() {
        for (int i = 1; i <= 100; i++) {
            if (i % 3 == 0 && i % 5 == 0) {
                System.out.println("FizzBuzz");
            } else if (i % 3 == 0) {
                System.out.println("Fizz");
            } else if (i % 5 == 0) {
                System.out.println("Buzz");
            } else {
                System.out.println(i);
            }
        }
    }
}