Java String Contains

The Java String.contains() method is used to check whether a specific sequence of characters exists within a given string. It returns a boolean value: true if the sequence is found, and false if it is not. This method is case-sensitive, meaning uppercase and lowercase characters must match exactly. The contains() method takes a single argument, which is a CharSequence, such as a string or a character array. It is commonly used in conditional statements to perform actions based on the presence of certain substrings. For example, it can be used to filter results, validate input, or search within text. Since it is simple and efficient, it is widely used in string handling and data processing tasks in Java programs. Reviewing core Java interview questions related to the String.contains() method can deepen understanding and improve problem-solving skills during technical interviews.

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