The Scanner class provides a powerful way to parse text for primitive types and strings using regular expressions. It can obtain input from any source that implements the Readable interface, such as an InputStream, File, or a String object, and can split the input into tokens based on delimiters, which are whitespace by default.
First read the answer fully, then try to explain it in your own words. After that, open a few related questions and compare the concepts. This method helps you remember the topic for a longer time and improves exam preparation.