Technical Programming: Use Of BufferedReader Class in Java for Accepting Input from User

Program using BufferedReader Class for accepting name entered for user through keyboard.

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Which Stream To Use ?
Java provides a useful input stream known as DataInputStream, which offers methods for reading characters,integers,floats etc.However only one constructor is defined for the class:
           java.io.DataInputStream(java.io.InputStream)

Within Java, streams are designed to be layered on top of each other that the programmer must connect together several streams to get the exact type of required functionality.I/O streams can be easily connect to one another by passing one stream as an argument to the other stream constructor eg,

          BufferedReader br=new BufferedReader(new FileReader(selectFile));

BufferedReader Class : This class contains a buffer for the data read and thus makes it possible to have methods like readLine() which reads a line of data from the file and returns null if there are no more lines to read.The BufferedReader can be seen as a handle to the file you want to read from.

Syntax :
InputStreamReader input = new InputStreamReader(System.in);
BufferedReader br= new BufferedReader(input);

Program

import java.io.*;

class Print // class name

{

// create BufferedReader Class instance

InputStreamReader input = new InputStreamReader(System.in);

BufferedReader br= new BufferedReader(input);

public void demo() throws IOException

{

String name;

System.out.println("What is your name ?");

name=keyboardInput.readLine();

System.out.print("\nHello"+name);

}

Output

What is your name ?

Amit

Expert Review: This program will help you to read the input given by the users from keyboard as there are many methods but this method is the best and simplest , easy code as well as shorter codes which will be eas for you to remeber.

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