Java - Regex for Full Name

Question

How can I validate regex for full name? I only want alphabets (no numericals) and only spaces for the regex. This is what I have done so far. Would you please help me fix th

Answer 1

public static boolean isFullname(String str) {
    return str.matches("^[a-zA-z ]*$");
}

this method returns true if the string only contains alphabets and spaces.

But it also return true if the string contains nothing.