Contains: Which word

Which word, “contains” or “contain,” should fill in the blank? Since we are referring to a single book in the third-person singular, we would use “contains.” Thus, the correct sentence is, “The book contains important information.” On the other hand, if we are talking about multiple books, we would use “contain.” The Java String contains () method is used to check whether the specific set of characters are part of the given string or not. It returns a boolean value true if the specified characters are substring of a given string and returns false otherwise. java.lang.String provides a boolean method contains() that returns ‘true’ if a sequence of characters is found within the given string and ‘false’ otherwise Learn how to use the contains() method to check if a string contains a sequence of characters. See syntax, parameter, return value, and examples of the method.