palindrome in java

1public static boolean checkPalindrome(String str)
2{     
3 
4    int len = str.length();
5
6    for(int i = 0; i < len / 2; i++)  {
7        if (str.charAt(i) != str.charAt(len - i - 1))
8            return false;
9    }
10    return true;
11}

1import java.util.*;   
2class PalindromeExample2  
3{  
4   public static void main(String args[])  
5   {  
6      String original, reverse = ""; // Objects of String class  
7      Scanner in = new Scanner(System.in);   
8      System.out.println("Enter a string/number to check if it is a palindrome");  
9      original = in.nextLine();   
10      int length = original.length();   
11      for ( int i = length - 1; i >= 0; i-- )  
12         reverse = reverse + original.charAt(i);  
13      if (original.equals(reverse))  
14         System.out.println("Entered string/number is a palindrome.");  
15      else  
16         System.out.println("Entered string/number isn't a palindrome.");   
17   }  
18}  

1import java.util.Scanner;
2
3public class Palindrome
4{
5  public static void main(String args[])
6  {
7    int num,temp,reverse=0;
8    Scanner input=new Scanner(System.in);
9    num=in.nextInt();
10    temp=num;
11    //code to reverse the number
12    while(temp!=0)
13    {
14      int d=temp%10; //extracts digit at the end
15      reverse=reverse*10+d;
16      temp/=10; //removes the digit at the end
17    }
18    // 'reverse' has the reverse version of the actual input, so we check
19    if(reverse==num)
20    {
21      System.out.println("Number is palindrome");
22    }
23    else
24    {
25      System.out.println("Number is not palindrome");
26    }
27  }
28}

1package test
2//The function below checks if a string is a palindrome
3//True = Is a palindrome & False = Not a palindrome
4	public boolean isPalindromString(String text){
5    	String reverse = reverse(text);
6      	if(text.equals(reverse))
7    	{
8        	return true;
9      	}
10      
11      	return false;
12    }
13//This function returns the reverse String of its input.
14//Ex. if given "hello", it will return "olleh"
15	public String reverse(String input)
16    {     
17		if(input == null || input.isEmpty())
18        {
19			return input;
20        }
21return input.charAt(input.length()- 1) + reverse
22                         (input.substring(0, input.length() - 1));
23    }

1public class PlaindromeTest1 {
2    public static void main(String[] args) {
3        Scanner input = new Scanner(System.in);
4System.out.println("Enter your words"); // Whats up body? // ?ydob pu stahW
5        String word = input.nextLine();
6
7        String reversedWord = "";
8        // start from last index number.
9        for(int i = word.length()-1; i>=0; i-- ){
10           reversedWord += word.charAt(i);
11        }
12        System.out.println(reversedWord);
13        //Level ==> leveL //ey edip adanada pide ye :)
14        boolean palindrome = word.equalsIgnoreCase(reversedWord);
15
16        System.out.println(palindrome);
17
18        String str = "Anna";
19        String result = "";
20
21        for(int i = str.length()-1; i>=0; i-- ){
22            result += str.substring(i, i+1);
23            // result += str.charAt(i); // char at de olur
24        }
25        boolean result1 = str.equalsIgnoreCase(result);
26        System.out.println(result1);
27    }

1package 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;		}	} }