/** Java IO, 2nd Edition */

import java.io.*;
import java.nio.*;
import java.nio.channels.*;
public class NIOCopier {
  public static void main(String[] args) throws IOException {
    FileInputStream inFile = new FileInputStream(args[0]);
    FileOutputStream outFile = new FileOutputStream(args[1]);
    FileChannel inChannel = inFile.getChannel( );
    FileChannel outChannel = outFile.getChannel( );
    ByteBuffer buffer = ByteBuffer.allocate(1024*1024);
    while (inChannel.read(buffer) != -1) {
      buffer.flip( );
      while (buffer.hasRemaining( )) outChannel.write(buffer);
      buffer.clear( );
    }
    inChannel.close( );
    outChannel.close( );
  }
}