某个数的阶乘

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Myself{

	public int inputInteger(){
		
		System.out.println("please input Integer......");
		String temp = null;
		try{
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			temp = br.readLine();
		}catch(Exception e){
			e.printStackTrace();
		}
		return Integer.valueOf(temp);
	}
	
	public void integerTest(int in){
		int temp = 1;
		if(in%2 == 0 ){
			for(int i = 1 ;i< in ;i++){
				temp = temp * (i * (i+1));
					i++;
			}
			
			System.out.println(in + "的阶乘是：" + temp);
		
		}else{
			for(int i = 1 ;i<= in ;i++){
				temp = temp * (i * (i+1));
					i++;
			}
			temp = temp/(in+1);
			System.out.println(in + "的阶乘是：" + temp);
		}
	}
	
	public static void main(String[] args){
		Myself myself = new Myself();
		int i = myself.inputInteger();
		myself.integerTest(i);
	}	
}