InputStreamReader in Java

An InputStreamReader is a bridge from byte streams to character streams.

It reads bytes and decodes them into characters using a specified charset. The charset that it uses may be specified by name or may be given explicitly, or the platform’s
default charset may be accepted.

For top efficiency, consider wrapping an InputStreamReader within a BufferedReader.

For example:

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

Constructors

Methods

package com.java.io;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class InputStreamReaderExample {

    public static void main(String[] args) {

        InputStream inputStream = null;
        InputStreamReader isr = null;
        try {
            inputStream = new FileInputStream("/Test/TestFolder/test-file.txt");
            isr = new InputStreamReader(inputStream);
            System.out.println("Encoding:" + isr.getEncoding());
            int data;
            if (isr.ready()) {
                while ((data = isr.read()) != -1) {
                    System.out.print((char) data);
                }
            }

        } catch (IOException ex) {
            ex.printStackTrace();
        } finally {
            if (inputStream != null)
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            if (isr != null)
                try {
                    isr.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
        }

    }

}

Encoding:UTF8
Test Data

Related Article

Java I/O Basics