BufferedReader Class
This class is used to read text from a character input stream. It provides the efficient reading of the character, arrays and line. It inherits the properties of Reader class.BufferedReader class used a readLine() method to reads a line of text.
For example:
BufferedReader br = new BufferedReader(System.in);
BufferedReader Class Constructors
BufferedReader (Reader in)This constructor creates a buffering input stream that uses a default size input buffered.
BufferedReader (Reader in, int size)
This constructor creates a buffering input stream that uses a specified size input buffered.
Example: Getting user input using BufferedReader class
import java.io.*;
public class BufferedDemo
{
public static void main(String args[])
{
try
{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Enter first number: ");
String n1 = br.readLine();
System.out.print("Enter second number: ");
String n2 = br.readLine();
//convert string into integer
int a = Integer.parseInt(n1);
int b = Integer.parseInt(n2);
int sum = a + b;
System.out.println("Result: "+sum);
}
catch(NumberFormatException nfe)
{
System.out.println("Enter only integer value");
}
catch(IOException io)
{
io.printStackTrace();
}
}
}
Output: 1
Enter first number: 30
Enter second number: 20
Result: 50
Output: 2
Enter first number: a
Enter second number: 23
Enter only integer value
