BigInteger和BigDecimal的实例

import java.math.*;
public class LargeFactorial {

public static void main(String[] args)
{
System.out.println("50! is \n"+factorial(50));
}
public static BigInteger factorial(long n)
{
BigInteger result=BigInteger.ONE;
for(int i=1;i<=n;i++)
{
result=result.multiply(new BigInteger(i+""));
}
return result;
}
}