Test.java Source code

Introduction

Here is the source code for Test.java

Source

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.SeekableByteChannel;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class Test {

    public static void main(String[] args) throws IOException {
        Path path = Paths.get("/users.txt");

        try (SeekableByteChannel sbc = Files.newByteChannel(path)) {
            ByteBuffer buffer = ByteBuffer.allocate(1024);

            sbc.position(4);
            sbc.read(buffer);
            for (int i = 0; i < 5; i++) {
                System.out.print((char) buffer.get(i));
            }

            buffer.clear();
            sbc.position(0);
            sbc.read(buffer);
            for (int i = 0; i < 4; i++) {
                System.out.print((char) buffer.get(i));
            }
            sbc.position(0);
            buffer = ByteBuffer.allocate(1024);
            String encoding = System.getProperty("file.encoding");
            int numberOfBytesRead = sbc.read(buffer);
            System.out.println("Number of bytes read: " + numberOfBytesRead);
            while (numberOfBytesRead > 0) {
                buffer.rewind();
                System.out.print("[" + Charset.forName(encoding).decode(buffer) + "]");
                buffer.flip();
                numberOfBytesRead = sbc.read(buffer);
                System.out.println("\nNumber of bytes read: " + numberOfBytesRead);
            }

        }

    }
}