String num = "86492387077532061"; int[] number = new int[num.length()]; String large = ""; for (int i = 0; i < num.length(); i++) { number[i] = Integer.parseInt(String.valueOf(num.charAt(i))); } for (int i = 0; i < num.length(); i++) { for (int j = 0; j < num.length() - i - 1; j++) { if (number[j] < number[j + 1]) { int temp = number[j]; number[j] = number[j + 1]; number[j + 1] = temp; } } } for (int i = 0; i < num.length(); i++) { large += Integer.toString(number[i]); } System.out.print(large);