What is the purpose of the contains method in Java?

In Java, the method contains() is used to check if a string contains another specified character sequence. Its purpose is to determine if a string includes a specific character sequence and return a boolean value. If it contains the sequence, it returns true; otherwise, it returns false.

The contains() method can be used to check if a string contains a specific substring, or to see if a string contains a certain character. It is useful for searching, checking, and filtering operations on strings.

For example, you can use the contains() method to determine if a string contains a certain keyword or to search for a specific character within the string.