Learn Java Tutorial for Beginners, Part 37: Reading Text Files

In this video by Quordnet Academy for the series Learn Java Tutorial for Beginners how to use Read Text Files have been discussed.
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Different ways of Reading a text file in Java
There are multiple ways of writing and reading a text file. this is required while dealing with many applications.

There are several ways to read a plain text file in Java e.g. you can use FileReader, BufferedReader or Scanner to read a text file. Every utility provides something special e.g. BufferedReader provides buffering of data for fast reading, and Scanner provides parsing ability.

Here are some of the many ways of reading files:
Using BufferedReader: This method reads text from a character-input stream. It does buffering for efficient reading of characters, arrays, and lines.
The buffer size may be specified, or the default size may be used. The default is large enough for most purposes.
In general, each read request made of a Reader causes a corresponding read request to be made of the underlying character or byte stream. It is therefore advisable to wrap a BufferedReader around any Reader whose read() operations may be costly, such as FileReaders and InputStreamReaders. For example,

BufferedReader in = new BufferedReader(Reader in, int size);
Using FileReader class: Convenience class for reading character files. The constructors of this class assume that the default character encoding and the default byte-buffer size are appropriate.
Constructors defined in this class are:
// Creates a new FileReader, given the
// File to read from.
FileReader(File file)

// Creates a new FileReader, given the
// FileDescriptor to read from.
FileReader(FileDescriptor fd)

// Creates a new FileReader, given the
// name of the file to read from.
FileReader(String fileName)
// Java Program to illustrate reading from
// FileReader using FileReader
public class ReadingFromFile
{
public static void main(String[] args) throws Exception
{
// pass the path to the file as a parameter
FileReader fr =

int i;
}
}
Using Scanner class: A simple text scanner which can parse primitive types and strings using regular expressions.
A Scanner breaks its input into tokens using a delimiter pattern, which by default matches whitespace. The resulting tokens may then be converted into values of different types using the various next methods.
// using Scanner Class
public class ReadFromFileUsingScanner
{
public static void main(String[] args) throws Exception
{
// pass the path to the file as a parameter
File file =
Scanner sc = new Scanner(file);

}
}
Reading the whole file in a List: Read all lines from a file. This method ensures that the file is closed when all bytes have been read or an I/O error, or other runtime exception, is thrown. Bytes from the file are decoded into characters using the specified charset.
public static List readAllLines(Path path,Charset cs)throws IOException

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