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CAVITE STATE UNIVERSITY
T3 CAMPUS
Department of Information Technology COSC 65 – Programming Languages

BufferedReader and InputStreamReader
Java BufferedReader and InputStreamReader comes under the java.io package.
BufferedReader main functionality is to read text from inputstream. Moreover, it is
used to store the characters in a buffer for the purpose of efficient handling of characters,
arrays and strings.
InputStreamReader is a bridge between byte streams and character streams. It reads
bytes and decodes them into characters using a specified charset.
It is recommended to wrap an InputStreamReader within a BufferedReader for optimal
efficiency.
//EXAMPLE OF java.io PACKAGE

import java.io.*;
public class BRISR {
public static void main(String[] args ) throws IOException {

// creating the InputStreamReader as ‘reader’ for inputs.
InputStreamReader reader = new InputStreamReader(System.in);

BufferedReader br = new BufferedReader(reader); // creating the BufferedReader ‘br’ to read
texts

String name; char mi; int age; float height; double weight; // variable initialization

System.out.println("Enter your name: ");
name = br.readLine();

System.out.println("Enter your middle initial: ");

mi = br.readLine().charAt(0);

System.out.println("Enter your age: ");
age = Integer.parseInt(br.readLine());

System.out.println("Enter your height: ");
height = Float.parseFloat(br.readLine());

System.out.println("Enter your weight: ");
weight = Double.parseDouble(br.readLine());

System.out.println("Your Name is " + name);
System.out.println("Your Middle Initial is " + mi);
System.out.println("Your Age is " + age);
System.out.println("Your Height is " + height);
System.out.println("Your Weight is " + weight);

} }
NOTE: // example: set the bufferedreader as ‘br’

String name = br.readLine(); - to read a string.
char a = br.readLine().charAt(0); - to read a character.
int num = Integer.parseInt(br.readLine()); - to read an integer
float = Float.parseFloat(br.readLine()); - to read a floating point number

double = Double.parseDouble(br.readLine()); - to read a double floating point
number
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