Convert InputStream to Reader using InputStreamReader - Java

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In this tutorial, we will see “How to convert InputStream to Reader in Java ?” An InputStreamReader class helps to convert InputStream to Reader. Here, we are going to use 2 different approaches to achieve this.

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Approach 1.

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
public class InputStreamReaderApproach1 {
    public static void main(String[] args) {
        String inputStringObj = "This is Techndeck, a Unique place for Programmers.";
        InputStream inputStreamObj = null;
        Reader readerObj = null;
        try {
            inputStreamObj = new ByteArrayInputStream(inputStringObj.getBytes());
            readerObj = new InputStreamReader(inputStreamObj, "UTF-8");
            int i;
            while ((i = readerObj.read()) != -1) {
                System.out.print((char) i);
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

import java.io.ByteArrayInputStream;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.Reader;

public class InputStreamReaderApproach1 {

public static void main(String[] args) {

String inputStringObj = "This is Techndeck, a Unique place for Programmers.";

InputStream inputStreamObj = null;

Reader readerObj = null;

try {

inputStreamObj = new ByteArrayInputStream(inputStringObj.getBytes());

readerObj = new InputStreamReader(inputStreamObj, "UTF-8");

int i;

while ((i = readerObj.read()) != -1) {

System.out.print((char) i);

}

} catch (Exception ex) {

ex.printStackTrace();

}

Output:

This is Techndeck, a Unique place for Programmers.

1	This is Techndeck, a Unique place for Programmers.

Approach 2.

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
public class InputStreamReaderApproach2 {
    public static void main(String[] args) {
        File fileObj = new File("/Users/d33p4k/Documents/Techndeck/JavaPractice/InputString"); //InputString is a .txt file //This is Mac based path, if you are using Windows or Linus, Choose accordingly.
        InputStream inputStreamObj = null;
        BufferedReader bufferedReaderObj = null;
        String lineObj = null;
        try {
            inputStreamObj = new FileInputStream(fileObj);
            bufferedReaderObj = new BufferedReader(new InputStreamReader(inputStreamObj));
            while (bufferedReaderObj.ready()) {
                lineObj = bufferedReaderObj.readLine();
                System.out.println(lineObj);
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStream;

import java.io.InputStreamReader;

public class InputStreamReaderApproach2 {

public static void main(String[] args) {

File fileObj = new File("/Users/d33p4k/Documents/Techndeck/JavaPractice/InputString"); //InputString is a .txt file //This is Mac based path, if you are using Windows or Linus, Choose accordingly.

InputStream inputStreamObj = null;

BufferedReader bufferedReaderObj = null;

String lineObj = null;

try {

inputStreamObj = new FileInputStream(fileObj);

bufferedReaderObj = new BufferedReader(new InputStreamReader(inputStreamObj));

while (bufferedReaderObj.ready()) {

lineObj = bufferedReaderObj.readLine();

System.out.println(lineObj);

}

} catch (Exception ex) {

ex.printStackTrace();

}

Output:

Hi, How are you?
This is Techndeck, a Unique place for Programmers.
I hope you will like the content of this website.

Hi, How are you?

This is Techndeck, a Unique place for Programmers.

I hope you will like the content of this website.

Do you like this Post? – then check my other helpful posts:

Convert InputStream to Reader using InputStreamReader – Java

Approach 1.

Approach 2.

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Convert InputStream to Reader using InputStreamReader – Java

Approach 1.

Approach 2.

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