Palindrome String is a sequence of characters that reads the same forwards and backwards i.e. the reverse of a palindrome string is identical to the original String.
Example:
String s1= ” level”
Reverse of the String s1=”level”
Output: String s1 is a palindrome string
String s2=”flower”;
Reverse of string s2=”rewolf”;
Output: String s2 is not a palindrome String
Approach:
First convert all the characters in the string to Lowercase. After that reverse the given original String. After reversing if the reversed string is same as original string, then the given string is a palindrome string.
import java.util.*;
Public class Palindrome{
public static void main( String args[] ) {
Scanner sc=new Scanner(System.in);
System.out.println(“Enter a String to check whether a given string is palindrome or not”);
String str=sc.nextLine();
str=str.toLowerCase();
String reverse=” “;
int length=str.length();
for(int i=length-1;i>=0;i– ) {
reverse=reverse+str.charAt(i);
}
System.out.println(“Reverse of the string is : “+reverse);
if(str.equals(reverse)){
System.out.println(“Given String is Palindrome”);
}
else{
System.out.println(“Given string is not a palindrome string”);
}
}
}