InputStreamReader & OutputStreamWriter – UTF file (example)

Leave a Comment / By Yogesh / May 8, 2016

Given the UTF contents, read & write utf contents using InputStreamReader & OutputStreamWriter.
We have already discussed similar posts:
- Read & write UTF file – BufferReader & BufferWriter (using NIO)
- Read & write contents (without UTF) using InputStreamReader/OutputStreamWriter

In this post, we will demonstrate read and write operation with UTF-8 contents.

Read write utf file – InputStreamReader & OutputStreamWriter

package org.learn.utf.io;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
 
public class SteamReaderWriter {
    public static void main(String[] args) throws IOException {
        writeUTFUsingStreamWriter();
        readUTFUsingStreamReader();
    }
 
    private static void writeUTFUsingStreamWriter() throws IOException {
        System.out.println("1. Start writting contents to file - OutputStreamWriter");
        String newLine = System.getProperty("line.separator");
        try (FileOutputStream fileStream = new FileOutputStream(new File("sampleUTFFile.txt"));
                OutputStreamWriter writer = new OutputStreamWriter(fileStream, "UTF-8")) {
            writer.write("Names of Jackie Chan:");
            writer.write(newLine);
            writer.write("房仕龍 (Fong Si-lung)");
            writer.write(newLine);
            writer.write("元樓 (Yuen Lou)");
            writer.write(newLine);
            writer.write("大哥 (Big Brother)");
            writer.write(newLine);
        }
        System.out.println("2. Successfully written contents to file - OutputStreamWriter");
    }
 
    private static void readUTFUsingStreamReader() throws IOException {
        try (FileInputStream fileStream = new FileInputStream(new File("sampleUTFFile.txt"));
                InputStreamReader reader = new InputStreamReader(fileStream, "UTF-8")) {
             
            System.out.println("\n3. Start Reading file using InputStreamReader:");
            int character;           
            while ((character = reader.read()) != -1) {
                System.out.print((char) character);
            }
            System.out.println("4. End Reading file using InputStreamReader");
        }
    }
}

The content of sampleUTFFile.txt is as follows:

OutputStreamWriter InputStreamReader — Fig 1: Written UTF contents

O/P: Read write file – InputStreamReader & OutputStreamWriter

1. Start writting contents to file - OutputStreamWriter
2. Successfully written contents to file - OutputStreamWriter
 
3. Start Reading file using InputStreamReader:
Names of Jackie Chan:
房仕龍 (Fong Si-lung)
元樓 (Yuen Lou)
大哥 (Big Brother)
4. End Reading file using InputStreamReader