2's complement binary number in decimal code example

Example: Java program to convert decimal number to binary & count number of 1s

// decimal to binary conversion in java
import java.util.Scanner;
public class DecimalBinaryDemo
{
   public static void main(String[] args)
   {
      int number, count = 0, temp;
      String strConvert = "";
      Scanner sc = new Scanner(System.in);
      System.out.println("Enter a decimal number : ");
      number = sc.nextInt();
      // decimal to binary java
      while(number > 0)
      {
         temp = number % 2;
         if(temp == 1)
         {
            count++;
         }
         strConvert = strConvert + " " + temp;
         number = number / 2;
      }
      System.out.println("Decimal to binary in java : " + strConvert);
      System.out.println("Number of 1s : " + count);
      sc.close();
   }
}