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);
int bytesRead = 0;
while (bytesRead >= 0 || buffer.hasRemaining()) {
if (bytesRead != -1) bytesRead = inChannel.read(buffer);
buffer.flip();
outChannel.write(buffer);
buffer.compact();
}
inChannel.close();
outChannel.close();
