第7周作业1-循环大战while

import javax.swing.*;public class FactorialTest {public static void main (String args[]){    int n;String s=(String)JOptionPane.showInputDialog(null,"请输入一个整数","1到n的阶乘",    JOptionPane.PLAIN_MESSAGE,null,null,null);    n=Integer.parseInt(s);long i=1,j=1,k=1;while (j<=n){k=k*j;System.out.println(j+"!="+k);j++;}}}