Get MappedByteBuffer from FileChannel : MappedByteBuffer « File « Java Tutorial

1. Java Tutorial
2. File
3. MappedByteBuffer

import java.io.RandomAccessFile;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;

public class MainClass {
  public static void main(String[] argv) throws Exception {
    RandomAccessFile raf = new RandomAccessFile("test.txt", "r");
    FileChannel fc = raf.getChannel();
    MappedByteBuffer buffer = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());

    buffer.clear();
    buffer.flip();

    System.out.println("hasArray=" + buffer.hasArray());
    System.out.println(buffer.toString());

    System.out.flush();
  }
}