Read /write UTF contents to/ from file in java (BufferReader /BufferWriter /example)

Leave a Comment / By Yogesh / May 8, 2016

Given UTF contents, read & write utf contents using BufferReader & BufferWriter in java.
1. Write UTF contents to the file using BufferWriter class in java.
2. Read UTF contents from file using BufferReader class in java.
3. Read & write contents without using java NIO feature.
We have already discussed similar posts:
- Read & write UTF file using BufferReader & BufferWriter (using NIO)
- Read & write utf contents using InputStreamReader/OutputStreamWriter (without NIO)

1. Read/write UTF contents to/from file in java (BufferReader/BufferWriter)

package org.learn.utf.io;
 
import java.io.BufferedReader;
import java.io.BufferedWriter;
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 BufferReaderWriter {
    public static void main(String[] args) throws IOException {     
        writeUTFUsingBufferWriter();
        readUTFUsingBufferReader(); 
    }
 
    private static void writeUTFUsingBufferWriter() throws IOException {
        System.out.println("1. Start writing contents to file using BufferedWriter");
        try (FileOutputStream fileStream = new FileOutputStream(new File("sampleUTFFile.txt"));
                OutputStreamWriter writer = new OutputStreamWriter(fileStream, "UTF-8");
                BufferedWriter bufferWriter = new BufferedWriter(writer)) {
            bufferWriter.write("Names of Jackie Chan:");
            bufferWriter.newLine();
            bufferWriter.write("房仕龍 (Fong Si-lung)");
            bufferWriter.newLine();
            bufferWriter.write("元樓 (Yuen Lou)");
            bufferWriter.newLine();
            bufferWriter.write("大哥 (Big Brother)");
        }
        System.out.println("2. Successfully written contents to file using BufferedWriter");
    }
     
    private static void readUTFUsingBufferReader() throws IOException {
        try (FileInputStream fileStream = new FileInputStream(new File("sampleUTFFile.txt"));
                InputStreamReader reader = new InputStreamReader(fileStream, "UTF-8");
                BufferedReader bufferedReader = new BufferedReader(reader)) {
            System.out.println("\n3. Start Reading file contents using BufferedReader");
            String line;             
            while ((line = bufferedReader.readLine()) != null) {
                System.out.println(line);
            }
            System.out.println("4. End Reading file contents using BufferedReader");
        }
    }
}

2. Contents written to sampleUTFFile.txt file:

BufferWriter file IO example — Fig 1: Written contents using BufferWriter

3. OP: Read/write UTF contents to/from file (BufferReader/BufferWriter)

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