Java examples for Lambda Stream:IntStream
combination from factorial via IntStream
//package com.java2s;
import java.util.stream.IntStream;
public class Main {
public static int combination(final int n, final int k) {
return factorial(n) / (factorial(k) * factorial(n - k));
}/*from w w w . j av a2 s. c om*/
public static int factorial(final int n) {
return IntStream.rangeClosed(1, n).reduce((x, y) -> x * y).getAsInt();
}
}