Decimal to Binary in java

/* input = 11
    output = 1011
*/

import java.io.*;
import java.util.Scanner;

class GFG {
public static void main (String[] args) {
//System.out.println("GfG!");
Scanner scan = new Scanner(System.in);
int decimalNumber = scan.nextInt();


String binary = "";
while(decimalNumber>0){
    binary += Integer.toString(decimalNumber%2);
    decimalNumber = decimalNumber/2;
}

StringBuffer sb = new StringBuffer(binary);
System.out.println(sb.reverse());


}
}