Java Important Pro

Java program to find whether no. is palindrome or not

class Palindrome

{

   public static void main(String args[])

   {

               int num = Integer.parseInt(args[0]);

               int n = num;

               int reverse=0,remainder;

               while(num > 0)

                {

                           remainder = num % 10;

                           reverse = reverse * 10 + remainder;

                           num = num / 10;

               }

               if(reverse == n)

                           System.out.println(n+" is a Palindrome Number");

               else

                           System.out.println(n+" is not a Palindrome Number");

   }

}

Java palindrome number

public class JavaPalindromeNumberExample

{

public static void main(String[] args)

{

int numbers[] = new int[]{121,13,34,11,22,54};

for(int i=0; i < numbers.length; i++)

{                        

int number = numbers[i];

int reversedNumber  = 0;

int temp=0;

while(number > 0)

{

temp = number % 10;

number = number / 10;

reversedNumber = reversedNumber * 10 + temp;

} 

if(numbers[i] == reversedNumber)

System.out.println(numbers[i] + " is a palindrome number");

else

System.out.println(numbers[i] + " is not a palindrome number");

          }

    }

}

Write a java program to check number string is palindrome or not with output

            import java.util.*;

            public class Palindrome 

{

    public static void main(String[] args) 

    {

        Scanner scanner = new Scanner(System.in);

                     System.out.println("Please enter a number: ");

        int num = scanner.nextInt();

        System.out.println("Please enter a string: ");

        String str = scanner.next();

                     Palindrome palin = new Palindrome();

        int revNum = palin.reverse(num);

        String revStr = palin.reverse(str);

                     if (num == revNum) 

       {

            System.out.printf("\n The number %d is a Palindrome ", num);

        } 

        else 

        {

            System.out.printf("\n The number %d is not a Palindrome ", num);

        }

        if (str.equalsIgnoreCase(revStr)) 

       {

            System.out.printf("\n The string '%s' is a Palindrome ", str);

        } 

        else 

          {

            System.out.printf("\n The string '%s' is not a Palindrome ", str);

        }

    }

    public int reverse(int num) 

   {

        int revNum = 0;

        while (num > 0) 

         {

            int rem = num % 10;

            revNum = (revNum * 10) + rem;

            num = num / 10;

        }

        return revNum;

    }

     public String reverse(String str) 

     {

        StringBuilder revStr = new StringBuilder();

        for (int i = str.length()-1; i >= 0; i--) 

       {

            revStr.append(str.charAt(i));

        }

        return revStr.toString();

    }

}

Find reverse of a given number and string with output

import java.util.*;

          public class RevNumString 

{

    public static void main(String[] args) 

    {

        Scanner scanner = new Scanner(System.in);

                     System.out.println("Please enter a number: ");

        int num = scanner.nextInt();

        System.out.println("Please enter a string: ");

        String str = scanner.next();

                     RevNumString rns = new RevNumString();

        int revNum = rns.reverse(num);

        String revStr = rns.reverse(str);

        System.out.printf("\n The reverse of number %d is %d ", num, revNum);

        System.out.printf("\n The reverse of string '%s' is '%s' ", str, revStr);

    }

    public int reverse(int num) 

    {

        int revNum = 0;

        while (num > 0) 

        {

            int rem = num % 10;

            revNum = (revNum * 10) + rem;

            num = num / 10;

        }

        return revNum;

    }

    public String reverse(String str) 

    {

        StringBuilder revStr = new StringBuilder();

        for (int i = str.length()-1; i >= 0; i--) 

        {

            revStr.append(str.charAt(i));

        }

        return revStr.toString();

    }

}