Java 大整数的递归阶乘方法。

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import java.math.BigInteger;

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public class Main/**时 代 J a v a 公 众 号 - nowjava.com**/

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{

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   // recursive method factorial (assumes its parameter is >= 0)

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   public static BigInteger factorial(BigInteger number)

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   {

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      if (number.compareTo(BigInteger.ONE) <= 0) // test base case

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         return BigInteger.ONE; 

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      else // recursion step

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         return number.multiply(factorial(number.subtract(BigInteger.ONE)));

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   } 

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   // output factorials for values 0-50

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   public static void main(String[] args)

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   {// from 时 代 J     a    v  a - nowjava.com

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      // calculate the factorials of 0 through 50

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      for (int counter = 0; counter <= 50; counter++){

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