ReverseNumber.java

packagecom.thealgorithms.maths;

/**
 * @brief utility class reversing numbers
 */
publicfinalclassReverseNumber {
privateReverseNumber() {
 }

/**
 * @brief reverses the input number
 * @param number the input number
 * @exception IllegalArgumentException number is negative
 * @return the number created by reversing the order of digits of the input number
 */
publicstaticintreverseNumber(intnumber) {
if (number < 0) {
thrownewIllegalArgumentException("number must be nonnegative.");
 }

intresult = 0;
while (number > 0) {
result *= 10;
result += number % 10;
number /= 10;
 }
returnresult;
 }
}