输入一个正整数 N，把它分解成质因数相乘的形式。 java写

输入一个正整数 N，把它分解成质因子相乘的形式。 java写
我写的总是得不到想要的结果：我是fresh 请高手帮忙
以下是我的代码
public class div {
public static void main(String[] args) {
  Scanner in = new Scanner(System.in);
  System.out.println("please enter a integer number");
  int number = in.nextInt();
  StringBuffer Sb = new StringBuffer("");
  Sb = Sb.append("1x");
  for(int i = 2;i <number; i ++){
   
  while(number % i == 0){
  Sb = Sb.append(i + "x");
  number = number / i;
  }
  continue;
   
  }
   
  System.out.println(Sb.substring(0,Sb.length()-1));
   
}

}


[解决办法]
for example

Java code

import java.util.*;public class Test {    public static void main(String[] args) throws Throwable {        Scanner in = new Scanner(System.in);        System.out.println("please enter a integer number");        int number = in.nextInt();        List<Integer> list = new ArrayList<Integer>();        int remain = number;        while (true) {            boolean flag = true;            for (int i=2; i<=(int)Math.sqrt(remain); i++) {                if (remain%i == 0) {                    list.add(i);                    remain = remain / i;                    flag = false;                    break;                }            }            if (flag) {                list.add(remain);                break;            }        }        if (list.size() == 1) {            System.out.printf("%d=1*%d\n", number, number);        } else {            StringBuilder buf = new StringBuilder();            buf.append(list.get(0));            for (int i=1; i<list.size(); i++) {                buf.append("*").append(list.get(i));            }            System.out.printf("%d=%s\n", number, buf);        }    }}