Anonymous user
FizzBuzz/Java: Difference between revisions
Enum
imported>Er2 (formatting) |
imported>Er2 (Enum) |
||
Line 180:
=== Enum ===
With Functional and OO elements
<syntaxhighlight lang="java">
import java.util.Arrays;
import java.util.function.IntPredicate;
import java.util.stream.IntStream;
public enum FizzBuzz {
Fizz(divisibleBy(3)),
Buzz(divisibleBy(5));
private final IntPredicate test;
FizzBuzz(IntPredicate test) {
this.test = test;
}
static IntPredicate divisibleBy(int i) {
return n -> n % i == 0;
}
String applyRule( int n) {
if (test.test(n))
return name();
return "";
}
private static String print(int i) {
String byRules = Arrays.stream(FizzBuzz.values())
.map(rule -> rule.applyRule(i))
.reduce("", String::concat);
return byRules.isEmpty() ? String.valueOf(i) : byRules;
}
public static void main(String[] args) {
IntStream.rangeClosed(1, 100)
.mapToObj(FizzBuzz::print)
.forEach(System.out::println);
}
}
</syntaxhighlight>
| |||