java - 将十进制转换为二进制

Question

代码大部分已完成，但我的代码打印错误，其打印结果为 110，而不是 011。我正在做的问题需要将“110”反转为“011”

import java.util.Scanner; 

public class LabProgram {   
    public static void main(String[] args) { 

Scanner scan = new Scanner(System.in);


   int num, binaryNum = 0;
   int i = 1, rem;

   num = scan.nextInt();

   while (num != 0)
   {
      rem = num % 2;
      num /= 2;
      binaryNum += rem * i;
      i *= 10;
   }


 System.out.println(binaryNum);
}
}

Answer 1

然后使用字符串，如下所示:

   int num = scan.nextInt();

   String s = "";
   while (num != 0) {
    int   rem = num % 2;
      num /= 2;
      s = s + rem; // this concatenates the digit to the string in reverse order.

      // if you want it in normal order, do it ->  s = rem + s;
   }
   System.out.println(s);