public class TenToTwo {

　　public static String change(long DecNumber) {

　　String BinNumber = "";

　　for (int i = 64; i >= 0; i--) {

　　if (DecNumber / (long) (Math.pow(2, i)) == 1) {

　　BinNumber = BinNumber + "1";

　　DecNumber = (long) (DecNumber - Math.pow(2, i));

　　} else {

　　if (!BinNumber.equals("")) {

　　BinNumber = BinNumber + "0";

　　}

　　}

　　}

　　return BinNumber;

　　}

　　/**

　　* @param args

　　*/

　　public static void main(String[] args) {

　　long DecNumber = 456;

　　System.out.println(TenToTwo.change(DecNumber));

　　}

　　}