Solution Review: Is String a Palindrome?

class Palindrome 
{
    public static void main(String args[]) 
    {
        System.out.println( checkPalindrome("madam"));
    }
    public static boolean checkPalindrome(String str)
    {
        if (str.length() == 0)
        {
            return true;
        }
        else
        {
            String reversedString = "";
            String currLetter;
            for(int i=0; i < str.length(); i++) 
            {
                currLetter = str.substring(i,i+1);
                // add the letter at index i to what's already reversed.
                reversedString = currLetter + reversedString;
            }
            if(str.equals(reversedString))
            {
                return true;
            }
            else
            {
                return false;
            }
        }
    }
}