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Java program to check string as palindrome
A string is Palindrome if position of each character remain same in case even string is reversed.For example 'MADAM' is a palidrome string as position of each character remain same even if string 'MADAM' is reversed.Now in order to identify a string as palindrome or not we can use library method approach and also without library method approach.
But if we want to check if "Madam" is palindrome or not , it will show us that it is not a palindrome because of the upper case of first letter.
Example - Without library method.
public class Palindrome {
public static void main(String[] args) {
String str = "SATYA";
StringBuffer newStr =new StringBuffer();
for(int i = str.length()-1; i >= 0 ; i--) {
newStr = newStr.append(str.charAt(i));
}
if(str.equalsIgnoreCase(newStr.toString())) {
System.out.println("String is palindrome");
} else {
System.out.println("String is not palindrome");
}
}
}Output
String is not palindrome
Example - With library method.
public class Palindrome {
public static void main (String[] args) throws java.lang.Exception {
String str = "NITIN";
String reverse = new StringBuffer(str).reverse().toString();
if (str.equals(reverse))
System.out.println("String is palindrome");
else
System.out.println("String is not palindrome");
}
}Output
String is palindrome
Updated on: 23-Jun-2020
3K+ Views
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