Recursive Lambda Expressions
Description
We can use a method reference when creating a recursive lambda expressions.
Example
The following code creates a recursive function in the normal way then use the recursive function as the method reference to create a lambda expression. The final lambda expression becomes recursive.
import java.util.function.IntFunction;
//from w w w. j av a 2 s .c o m
public class Main {
public static void main(String[] args) {
IntFunction<Long> factorialCalc = Main::factorial;
System.out.println(factorialCalc.apply(10));
}
public static long factorial(int n) {
if (n == 0) {
return 1;
} else {
return n * factorial(n - 1);
}
}
}
The code above generates the following result.
