- Java Basic Programs
- Java Programming Examples
- Java Print Hello World
- Java Get Input from User
- Java Print Integer
- Java Add two Numbers
- Java Check Even or Odd
- Java Check Prime or Not
- Java Check Alphabet or Not
- Java Check Vowel or Not
- Check Reverse equal Original
- Java Fahrenheit to Celsius
- Java Celsius to Fahrenheit
- Java Perfect Number Program
- Java Find Quotient Remainder
- Java Days to Seconds
- Java Count Digits in Number
- Java Binary Number Addition
- Java Discount Program
- Java Compute Courier Charge
- Java Find Telephone Bill
- Java Print ASCII Values
- Java Check Palindrome or Not
- Java Check Armstrong or Not
- Generate Armstrong Numbers
- Add two Numbers using Pointers
- Java Mathematical Programs
- Add Subtract Multiply & Divide
- Java Make Calculator
- Java Add Digits of Number
- Java Check Leap Year or Not
- Java Check Divisibility
- Java Find Simple Interest
- Java Find Compound Interest
- Java Print Fibonacci Series
- Java Find nCr nPr
- Calculate Average & Percentage
- Java Calculate Arithmetic Mean
- Java Calculate Student Grade
- Java Print Table of Number
- Java Print Prime Numbers
- Java Add n Numbers
- Java Interchange two Numbers
- Java Reverse Numbers
- Java Swap two Numbers
- Count Positive Negative & Zero
- Find Largest of two Numbers
- Find Largest of three Numbers
- Java Find Factorial of Number
- Java Find HCF & LCM
- Area & Perimeter of Square
- Area & Perimeter of Rectangle
- Area & Circumference of Circle
- Java Conversion Programs
- Java Decimal to Binary
- Java Decimal to Octal
- Java Decimal to Hexadecimal
- Java Binary to Decimal
- Java Binary to Octal
- Java Binary to Hexadecimal
- Java Octal to Decimal
- Java Octal to Binary
- Java Octal to Hexadecimal
- Java Hexadecimal to Decimal
- Java Hexadecimal to Binary
- Java Hexadecimal to Octal
- Java Pattern Programs
- Java Pattern of Stars
- Java Pattern of Alphabets
- Java Pattern of Numbers
- Java Pyramid of Stars
- Java Pyramid of Alphabets
- Java Pyramid of Numbers
- Java Print Diamond Pattern
- Java Print Floyd Triangle
- Java Print Pascal Triangle
- Java Array Programs
- One Dimensional Array Program
- Java Linear Search
- Java Binary Search
- Find Largest Element in Array
- Find Smallest Element in Array
- Java Reverse Array
- Insert Element in Array
- Delete Element from Array
- Java Merge two Array
- Java Bubble Sort
- Java Selection Sort
- Java Insertion Sort
- Java Find Common Elements
- Java Count Even/Odd Number
- Two Dimensional Array Program
- Java Add two Matrices
- Java Subtract two Matrices
- Java Transpose Matrix
- Multiply two Matrices
- Three Dimension Array Program
- Java String Programs
- Java Print String
- Find Length of String
- Java Compare two String
- Java Copy String
- Java Concatenate String
- Java Reverse String
- Delete Vowels from String
- Delete Words from Sentence
- Find Occurrence of a Character
- Java Find Occurrence of a Word
- Occurrence of Each Character
- Java Occurrence of Each Word
- Java Count Repeated Characters
- Java Count Repeated Words
- Java Capitalize Each Word
- Java Count Vowels/Consonants
- Java Extract Numbers
- Java Count Word in String
- Remove Spaces from String
- Java Sort a String
- Java Uppercase to Lowercase
- Java Lowercase to Uppercase
- Java Swap two Strings
- Java Check Anagram or Not
- Java Check Balance Parentheses
- Java Check Password Strength
- Java File Programs
- Java Read File
- Java Write to File
- Read & Display File Content
- Java Copy File
- Java Append Text to File
- Java Merge two File
- List files in Directory
- Java Delete File
- Java Miscellaneous Programs
- Generate Random Numbers
- Java Print Time & Date
- Java Get IP Address
- Java Shutdown Computer
- Java Programming Tutorial
- Java Tutorial
Java Program to Check Palindrome or Not
This article is created to cover multiple programs in Java that checks whether a number or string is a palindrome number/string or not. The two programs covered in this article are:
- Java Program to Check Palindrome Number or Not
- Java Program to Check Palindrome String or Not
Note - A number whose reverse is equal to the number itself, is called a palindrome number. For example, 12321, 121, 1001 etc. are palindrome numbers.
Note - A string whose reverse is equal to the original string, is called as a palindrome string. For example, radar, madam, refer, level, reviver etc. are all palindrome strings.
Check Palindrome Number in Java
The question is, write a Java program to check whether a given number is a palindrome number or not. The number must be received by user at run-time of the program. The program given below is its answer:
import java.util.Scanner; public class fresherearth { public static void main(String[] args) { int num, rev=0, rem, temp; Scanner scan = new Scanner(System.in); System.out.print("Enter a Number: "); num = scan.nextInt(); temp = num; while(temp!=0) { rem = temp%10; rev = (rev*10) + rem; temp = temp/10; } if(num==rev) System.out.println("\nIt is a Palindrome Number."); else System.out.println("\nIt is not a Palindrome Number."); } }
The snapshot given below shows the sample run of above Java program on checking whether a given number is a palindrome number or not, with user input 12321:
The above program can also be created in this way:
import java.util.Scanner; public class fresherearth { public static void main(String[] args) { int rev=0; Scanner scan = new Scanner(System.in); System.out.print("Enter a Number: "); int num = scan.nextInt(); int temp = num; while(temp!=0) { rev = (rev*10) + (temp%10); temp /= 10; } if(num==rev) System.out.println("\n" +num+ " is a Palindrome Number."); else System.out.println("\n" +num+ " is not a Palindrome Number."); } }
Here is its sample run with user input 1245
Check Palindrome String in Java
The question is, write a Java program to check whether a string entered by user at run-time, is a palindrome string or not. The program given below is its answer:
import java.util.Scanner; public class fresherearth { public static void main(String[] args) { String str, strReverse=""; char ch; int i, strLen; Scanner scan = new Scanner(System.in); System.out.print("Enter the String: "); str = scan.nextLine(); strLen = str.length(); i = (strLen-1); while(i>=0) { ch = str.charAt(i); strReverse = strReverse + ch; i--; } if(str.equals(strReverse)) System.out.println("\n\"" +str+ "\" is a Palindrome String."); else System.out.println("\n\"" +str+ "\" is not a Palindrome String."); } }
The sample run of above program with user input radar is shown in the snapshot given below:
Same Program in Other Languages
« Previous Program Next Program »