fizbuzz.java
· 947 B · Java
原始文件
import java.util.*;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
// wowey, wow, wow.
public class Main {
public static void main(String[] args) {
int[] arr = IntStream.rangeClosed(1, 100).toArray();
Map<Predicate<Integer>, String> preds = new LinkedHashMap<>();
preds.put(x -> x % 3 == 0, "Fizz");
preds.put(x -> x % 5 == 0, "Buzz");
System.out.println(fizzBuzz(arr, preds));
}
private static String fizzBuzz(int[] arr, Map<Predicate<Integer>, String> preds) {
return Arrays.stream(arr)
.mapToObj(x -> preds.entrySet().stream()
.filter(entry -> entry.getKey().test(x))
.map(Map.Entry::getValue)
.reduce(String::concat)
.orElse(String.valueOf(x)))
.collect(Collectors.joining(" "));
}
}
| 1 | import java.util.*; |
| 2 | import java.util.function.Predicate; |
| 3 | import java.util.stream.Collectors; |
| 4 | import java.util.stream.IntStream; |
| 5 | |
| 6 | // wowey, wow, wow. |
| 7 | |
| 8 | public class Main { |
| 9 | public static void main(String[] args) { |
| 10 | int[] arr = IntStream.rangeClosed(1, 100).toArray(); |
| 11 | |
| 12 | Map<Predicate<Integer>, String> preds = new LinkedHashMap<>(); |
| 13 | preds.put(x -> x % 3 == 0, "Fizz"); |
| 14 | preds.put(x -> x % 5 == 0, "Buzz"); |
| 15 | |
| 16 | System.out.println(fizzBuzz(arr, preds)); |
| 17 | } |
| 18 | |
| 19 | private static String fizzBuzz(int[] arr, Map<Predicate<Integer>, String> preds) { |
| 20 | return Arrays.stream(arr) |
| 21 | .mapToObj(x -> preds.entrySet().stream() |
| 22 | .filter(entry -> entry.getKey().test(x)) |
| 23 | .map(Map.Entry::getValue) |
| 24 | .reduce(String::concat) |
| 25 | .orElse(String.valueOf(x))) |
| 26 | .collect(Collectors.joining(" ")); |
| 27 | } |
| 28 | } |
| 29 | |
| 30 |