// Use NIO to read a text file.

import java.io.*;

import java.nio.*;

import java.nio.channels.*;

public class ExplicitChannelRead {

public static void main(String args[]) {

FileInputStream fIn;

FileChannel fChan;

long fSize;

ByteBuffer mBuf;

try {

// First, open a file for input.

fIn = new FileInputStream("test.txt");

// Next, obtain a channel to that file.

fChan = fIn.getChannel();

// Now, get the file's size.

fSize = fChan.size();

// Allocate a buffer of the necessary size.

mBuf = ByteBuffer.allocate((int)fSize);

// Read the file into the buffer.

fChan.read(mBuf);

// Rewind the buffer so that it can be read.

// Rewinds this buffer. The position is set to zero and the mark is

// discarded.

mBuf.rewind();

// Read bytes from the buffer.

for(int i=0; i < fSize; i++)

System.out.print((char)mBuf.get());

System.out.println();

// close channel and file

fChan.close();

fIn.close();

} catch (IOException exc) {

System.out.println(exc);

System.exit(1);

}

}

}