在转换顺序有问题的java中将十进制转换为二进制

Question

Hey so I'm taking my first cs course ever at my university its taught in java. I'm having trouble converting decimal to binary. I seem to be able to get the correct output but its in reverse order, and I have no idea how to put it in the correct order, here is what I've coded so far,

import java.util.*;
public class lab6 {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
   System.out.print("Enter a decimal number to convert to binary: ");
   int x = input.nextInt();
   int y;
   String y1="";
   while(x!=0){
       y=x%2;
       x=x/2;
       y1 = Integer.toString(y);
       System.out.print(y1+" ");
     }    
}
}

Answer 1

您可以将数字存储在某个容器中（例如ArrayList ），然后在迭代时将其迭代回到前面打印每个数字。

Answer 2

要添加到Ivaylo答案，您还可以将其存储在StringBuilder并使用reverse方法将其反转 。

Answer 3

It seems you are showing the output in correct order only. But if you want to reverse the current output you can use below code:

        Scanner input = new Scanner(System.in);
        System.out.print("Enter a decimal number to convert to binary: ");
        int x = input.nextInt();
        int y;
        String y1="";
        String reverse = "";
        while(x!=0){
           y=x%2;
           x=x/2;
           y1 = Integer.toString(y);
         //  System.out.print(y1+" ");
           reverse = y1+" "+reverse;
         }          
        System.out.println("Reverse Order :"+reverse);