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

  1. 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.
  2. 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
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