Just Java™ 2

A Mapped I/O HTTP Server

The final section of this chapter presents the code to use the new mapped I/O facility in a socket server. As a refresher, here is a program that uses channel I/O to duplicate a file:

import java.io.*;import java.nio.*;import java.nio.channels.*;import java.net.*;class DupFile {    void copyThruChannel(String fname) throws Exception {        File f = new File(fname);        FileInputStream fin = new FileInputStream(f);        int len = (int) f.length();        FileChannel fc = fin.getChannel();        System.out.println("allocating buff");        ByteBuffer myBB = ByteBuffer.allocate(len);        int bytesRead = fc.read(myBB);        myBB.flip();        System.out.println("getting fout channel");        FileOutputStream fos = new FileOutputStream(fname+".copy"); ...