check if a number is palindrome in java

public class StringPalindromeJava { public static void isPalindrome(String str) { String strReverse = new StringBuffer(str).reverse().toString(); // checking for palindrome if(str.equals(strReverse)) { System.out.println(str + " is palindrome string."); } else { System.out.println(str + " is not palindrome string."); } } public static void main(String[] args) { // palindrome java isPalindrome("eye"); isPalindrome("rotator"); } }

easy palindrome program in java

import java.util.*;   
class PalindromeExample2  
{  
   public static void main(String args[])  
   {  
      String original, reverse = ""; // Objects of String class  
      Scanner in = new Scanner(System.in);   
      System.out.println("Enter a string/number to check if it is a palindrome");  
      original = in.nextLine();   
      int length = original.length();   
      for ( int i = length - 1; i >= 0; i-- )  
         reverse = reverse + original.charAt(i);  
      if (original.equals(reverse))  
         System.out.println("Entered string/number is a palindrome.");  
      else  
         System.out.println("Entered string/number isn't a palindrome.");   
   }  
}

Posted by: Guest on August-28-2020

import java.util.Scanner; public class Palindrome { public static void main(String args[]) { int num,temp,reverse=0; Scanner input=new Scanner(System.in); num=in.nextInt(); temp=num; //code to reverse the number while(temp!=0) { int d=temp%10; //extracts digit at the end reverse=reverse*10+d; temp/=10; //removes the digit at the end } // 'reverse' has the reverse version of the actual input, so we check if(reverse==num) { System.out.println("Number is palindrome"); } else { System.out.println("Number is not palindrome"); } } }

package com.candidjava; import java.util.Scanner; public class PalindromeUptoN{ public static void main(String[] args) { int n, b, rev = 0; Scanner sc = new Scanner(System.in); System.out.println("Enter the Palindrome No N:"); int N = sc.nextInt(); System.out.print("Palindrome numbers from 1 to N:"); for (int i = 1; i <= N; i++) { n = i; while (n > 0) { b = n % 10; rev = rev * 10 + b; n = n / 10; } if (rev == i) { System.out.print(i + " "); } rev = 0; } } }

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