Using a FileReader

• The FileReader class creates a Reader object used to read the contents of a file.

• The most common constructor is FileReader(String filename).

• This constructor throws the FileNotFoundException exception if the file does not exist.

• FileReader is derived from InputStreamReader and Reader, inheriting their methods.

• FileReader is encapsulated in a BufferedReader.
  Encapsulation allows access to the readLine() method, which reads lines from the file.

• Closing BufferedReader (br) automatically closes the associated file.

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