HDU1042 N!（java）

Problem Description
Given an integer N(0 ≤ N ≤ 10000), your task is to calculate N!

Input
One N in one line, process to the end of file.

Output
For each N, output N! in one line.

Sample Input
1
2
3

Sample Output
1
2
6

先打表（打表的含義是先將範圍內的所有結果求出，然後根據輸出輸出具體結果）。

import java.math.BigInteger;
import java.util.Scanner;


public class P1042 {
    BigInteger[] bigArray = new BigInteger[10001];
    public static void main(String[] args) {
        new P1042().run();
    }

    public void run(){
        Scanner scanner = new Scanner(System.in);
        initial();
        int n;
        while (scanner.hasNext()) {
            n = scanner.nextInt();
            System.out.println(bigArray[n]);
        }
        scanner.close();
    }

    public void initial(){
        bigArray[0] = BigInteger.ONE;
        bigArray[1] = BigInteger.ONE;
        for (int i = 2; i < 10001; i++) {
            bigArray[i] = bigArray[i - 1].multiply(BigInteger.valueOf(i));
        }
    }
}