(Java) Boolean Expressions (Determining if a word is a tautonym)

Complete the following code in order to determine if a word if a given word can be considered as a "tautonym". A tautonym is a word that is formed by the repetition of a subword, e.g. tartar (tar and tar). Thus, its first half is exactly the same as the second half (so a word with an odd number of characters cannot be tautonym). The empty word is not considered as a tautonym. Assume that the word to be analyzed is stored in a String variable called word, which has already been initialized. Use the boolean variable isTautonym and define a boolean expression to decide if word is a tautonym.

// TODO: Write your code here

boolean isTautonym = ();