Your Java Programmers Are Here
April 11, 2022 • By Tomy • 0 Comments
package com.journaldev.util;
public class Palindrome {
public static boolean isPalindrome(String str) {
if (str == null)
return false;
StringBuilder strBuilder = new StringBuilder(str);
strBuilder.reverse();
return strBuilder.toString().equals(str);
}
public static void main(String[] args) {
System.out.println(“Is aba palindrome? ” + Palindrome.isPalindrome(“aba”));
System.out.println(“Is abc palindrome? ” + Palindrome.isPalindrome(“abc”));}}
import java.util.Scanner;
public class Palindrome {
public static void main(String[] args) {
do {
Scanner sc = new Scanner(System.in);
System.out.println(“Enter the string: “);
String str = sc.nextLine();
StringBuffer sb = new StringBuffer(str);
sb.reverse();
if (str.equalsIgnoreCase(sb.toString())) {
System.out.println(“Entered string is a palindrome”);
} else {
System.out.println(“Entered string is not a palindrome”);
}
} while (askAgain());
}
private static boolean askAgain() {
Scanner sc = new Scanner(System.in);
System.out.println(“Do you want to check another palindrome? Yes/No”);
String answer = sc.nextLine();
if (answer != null && answer.length() > 0) {
if (answer == “Yes” || answer == “yes”) {
return true; // answer
package palindrome;
import java.util.Scanner;
public class Palindrome {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print(“Enter a word: “);
String word = input.nextLine();
int low = 0; //starting point of the string
int high = word.length() – 1; //ending point of the string
boolean isPalindrome = true; // to check if it is a palindrome or not
while (low < high) { if (word.charAt(low) != word.charAt(high)) { //check each character from starting and ending and compare them together isPalindrome = false; //if the characters are not same then its not a palindrome break;// break out of the loop as soon as we know it is not a palindrome } low++; //incrementing starting point by one till it becomes equal to ending point import java.io.*; class Palindrome { public static void main(String args[])throws IOException { int rev=0,rem,n; BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); System.out.println("Enter the number:"); n=Integer.parseInt(br.readLine()); int temp=n; while(n>0)
{
rem=n%10;
rev=rev*10+rem;
n/=10;// n=n/10 also correct.
}
if(temp==rev) // n is redundant as temp stores the initial value of n that we assigned in line 6 and rev is the reverse of this value. You can use any of them here and it will work fine. I used temp because it is the original name of the variable used in line 6 and I didn’t want to confuse you by changing it’s name here! If you find any mistake in my code please do inform me so that I can make necessary changes in my code. Please use Beautiful Code plugin if you find any errors other than logical errors! Thanks! 🙂
public class Palindrome {
public static void main(String[] args) {
int num = 121, reversedInteger = 0, remainder, originalInteger;
originalInteger = num;
// reversed integer is stored in variable
while( num != 0 )
{
remainder = num % 10;
reversedInteger = reversedInteger * 10 + remainder;
num /= 10;
}
// palindrome if orignalInteger and reversedInteger are equal
if (originalInteger == reversedInteger)
System.out.println(originalInteger + ” is a palindrome.”);
else
System.out.println(originalInteger + ” is not a palindrome.”);
}
}
import java.util.*;
public class Palindrome {
public static void main(String[] args) {
System.out.println(“Enter a string”);
Scanner input=new Scanner(System.in);
String str=input.nextLine();
int i,len,flag=0;
len=str.length();
for (i=0;i
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