toStringにロジックを書いたFizzBuzz

ToStringFizzBuzz.java

package example;

import java.util.function.Supplier;

public class ToStringFizzBuzz {

	private final int value;

	public ToStringFizzBuzz(int value) {
		assert value >= 1;
		this.value = value;
	}

	@Override
	public String toString() {
		Supplier<String> s = () -> equals(3) ? "Fizz" : equals(5) ? "Buzz" : equals(15) ? "FizzBuzz" : Integer.toString(value);
		if (value == 1) {
			return s.get();
		}
		return new ToStringFizzBuzz(value - 1) + System.lineSeparator() + s.get();
	}

	@Override
	public boolean equals(Object obj) {
		if (obj instanceof ToStringFizzBuzz) {
			return value == ((ToStringFizzBuzz) obj).value;
		}
		if (obj instanceof Integer) {
			return hashCode() == (int) obj;
		}
		return false;
	}

	@Override
	public int hashCode() {
		boolean b3 = value % 3 == 0;
		boolean b5 = value % 5 == 0;
		return (b3 && b5) ? 15 : b3 ? 3 : b5 ? 5 : 0;
	}

	public static void main(String... args) {
		System.out.println(new ToStringFizzBuzz(100));
	}
}