Solution Review: Is ArrayList a Palindrome?

import java.util.ArrayList;
class Palindrome 
{
    public static void main(String args[]) 
    {
        ArrayList<String> str = new ArrayList<String>();
        // Adding elements
        str.add("m");
        str.add("a");
        str.add("d");
        str.add("a"); 
        str.add("m"); 
        System.out.println(checkPalindrome(str));
    }
    public static boolean checkPalindrome(ArrayList<String> str)
    {
        if (str.size() == 0)
        {
          return true;
        }
        else
        {
            boolean cont = true;    // Keep track whether it's plaindrome or not
            for(int i = 0; i < str.size()/2 && cont; i++) 
            {
                if (str.get(i) != str.get(str.size()-1-i))    // Comparing values
                {
                    cont = false;   // Match not found
                }
            }
            if (cont)
              return true;
            else
              return false;
        }
    }
}