Java Program to Check Palindrome

A palindrome is a word, number, or string that reads the same forward and backward.

Examples:

• madam

• level

• 121

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🔹 Using String Reverse Logic

public class PalindromeCheck {
    public static void main(String[] args) {

        String original = "madam";
        String reversed = "";

        for(int i = original.length() - 1; i >= 0; i--) {
            reversed = reversed + original.charAt(i);
        }

        if(original.equals(reversed)) {
            System.out.println("Palindrome");
        } else {
            System.out.println("Not a Palindrome");
        }
    }
}

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🔹 Using Two-Pointer Approach (Efficient Method)

public class PalindromeCheck {
    public static void main(String[] args) {

        String str = "level";
        boolean isPalindrome = true;

        int start = 0;
        int end = str.length() - 1;

        while(start < end) {
            if(str.charAt(start) != str.charAt(end)) {
                isPalindrome = false;
                break;
            }
            start++;
            end--;
        }

        if(isPalindrome)
            System.out.println("Palindrome");
        else
            System.out.println("Not a Palindrome");
    }
}

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🔹 Output

Palindrome

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✅ Conclusion

Checking a palindrome is a common Java interview question that helps evaluate string handling and logical thinking skills.

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