import java.io.FileInputStream;

import java.io.IOException;

import java.nio.channels.FileChannel;

import java.nio.channels.Channels;

import java.nio.channels.WritableByteChannel;

public class FileChannelTransfer{

public static void main(String[] args){

if(args.length!=1){

System.err.println("usage: java FileChannelTransfer file");

return;

}

FileInputStream fis = null;

try{

fis = new FileInputStream(args[0]);

FileChannel fc = fis.getChannel(); // position initially sunsequent input stream reading position

WritableByteChannel outChannel = Channels.newChannel(System.out);

fc.transferTo(0, fc.size(), outChannel); // transfer bytes to another channel without intermediate buffers.

}catch(IOException ioe){

ioe.printStackTrace();

}finally{

if(fis!=null){

try{

fis.close();

}catch(IOException ioe){

ioe.printStackTrace();

}

}

}

}

}