// newio/TransferTo.java

// (c)2021 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

// Using transferTo() between channels

// {java TransferTo TransferTo.java TransferTo.txt}

import java.nio.channels.*;

import java.io.*;

public class TransferTo {

public static void main(String[] args) {

if(args.length != 2) {

System.out.println(

"arguments: sourcefile destfile");

System.exit(1);

}

try(

FileChannel in = new FileInputStream(

args[0]).getChannel();

FileChannel out = new FileOutputStream(

args[1]).getChannel()

) {

in.transferTo(0, in.size(), out);

// Or:

// out.transferFrom(in, 0, in.size());

} catch(IOException e) {

throw new RuntimeException(e);

}

}

}