What Is the Role of InputStreamReader in Java Input Handling?

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Khushi Singh · Answer

Java uses
InputStreamReader as an essential input management component, which translates byte streams into character streams for input processing. The
InputStreamReader belongs to the 
java.io package and converts bytes into characters through specified encoding schemes. The
InputStreamReader class functions best at receiving input from keyboard or file, or network connections using
System.InputStream.
The main benefit of InputStreamReader occurs when it reads character data streams from byte-based input sources. The Unicode processing of Java characters becomes possible through
InputStreamReader by implementing accurate encoding interpretations of the byte data received. Working with various languages together with character sets demands this feature.
User input from the console requires the combination of an InputStreamReader with a
BufferedReader to manage performance alongside line-based data reading. The InputStreamReader class allows flexible reading of raw character data, while the
Scanner class includes built-in methods for data type parsing.
The following demonstrates how to implement InputStreamReader with
BufferedReader to acquire user input:
import java.io.*;
public class InputStreamReaderExample {
   public static void main(String[] args) throws IOException {
       InputStreamReader reader = new InputStreamReader(System.in);
       BufferedReader bufferedReader = new BufferedReader(reader);
       System.out.print("Enter your name: ");
       String name = bufferedReader.readLine();
       System.out.println("Hello, " + name + "!");
       bufferedReader.close();
   }
}
The InputStreamReader class retrieves data from 
System.in while the BufferedReader class reads the entire lines of input efficiently. The combination of
BufferedReader with InputStreamReader brings exceptional value to large input management by minimizing read operations for enhanced performance. Applications that need character encoding capabilities alongside efficient byte stream input rely on the InputStreamReader 
class for their operation.

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What Is the Role of InputStreamReader in Java Input Handling?

Ashutosh Kumar Verma

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