Hey so I wrote a program for an assignment at college and I'd like to receive some pointers on making my code a little more efficient. It'd be much appreciated. I'm still new to coding so I apologize if my code is horrendous.
/******************************************************************************
* Program Name: Lab07 - Palindrome Program
* Program Description: This program determines whether a number is a Palindrome or not
it rejects any single digit entries or negative entries.
* Program Author: Alexis Davalos
* Date Created: 11/4/2013
* Change# Change Date Programmer Name Description
* ------- ------------ ------------------- ---------------------
******************************************************************************/
package lab07;
import java.util.Scanner;
public class Lab07 {
public static int reverse(int number){
int result = 0;
while (number !=0){
int remainder = number % 10;
result = result * 10 + remainder;
number = number / 10;
}
return result;
}
public static boolean isPalindrome(int input){
int Palindrome = reverse(input);
if (Palindrome == input){
return true;
}
else
return false;
}
public static void main(String[] args) {
int integer = 0;
Scanner input = new Scanner(System.in);
System.out.print("Enter a positive, multi-digit integer: ");
integer = input.nextInt();
while (integer <= 9 && integer > 0)
{
System.out.println(integer + " is a single digit. Please re-enter another integer: ");
integer = input.nextInt();
if (isPalindrome(integer) && (integer > 0 && integer > 9))
{
System.out.println(integer + " is a palindrome");
return;
}
else if (!isPalindrome(integer) && (integer > 0 && integer > 9))
{
System.out.println(integer + " is not a palindrome");
return;
}
}
while (integer < 0)
{
System.out.println(integer + " is negative. Please re-enter another integer: ");
integer = input.nextInt();
if (isPalindrome(integer) && (integer > 0 && integer > 9))
{
System.out.println(integer + " is a palindrome");
return;
}
else if (!isPalindrome(integer) && (integer > 0 && integer > 9))
{
System.out.println(integer + " is not a palindrome");
return;
}
while (integer <= 9 && integer > 0)
{
System.out.println(integer + " is a single digit. Please re-enter another integer: ");
integer = input.nextInt();
if (isPalindrome(integer) && (integer > 0 && integer > 9))
{
System.out.println(integer + " is a palindrome");
return;
}
else if (!isPalindrome(integer) && (integer > 0 && integer > 9))
{
System.out.println(integer + " is not a palindrome");
return;
}
}
}
while (integer > 9){
if (isPalindrome(integer) && (integer > 0 && integer > 9))
{
System.out.println(integer + " is a palindrome");
return;
}
else if (!isPalindrome(integer) && (integer > 0 && integer > 9))
{
System.out.println(integer + " is not a palindrome");
return;
}
}
}
}