this snippet will reverse an input digit.
int number = 0;
number = value.nextInt();
String StringNUM = Integer.toString(number); // integer to string
StringBuilder numberreverse = new StringBuilder(); // creates a new use of string builder
numberreverse.append(StringNUM); // appends StringNUM
numberreverse = numberreverse.reverse(); // reverses it
for (int i=0; i<numberreverse.length(); i++) // loop to display
System.out.print(numberreverse.charAt(i));