从通道创建流

import java.io.File;

import java.io.IOException;
/** from 
NowJava.com - 时  代  Java**/

import java.io.InputStream;

import java.io.OutputStream;

import java.io.RandomAccessFile;

import java.nio.channels.Channels;

import java.nio.channels.FileChannel;


public class Main {

  public static void main(String[] argv) {

    try {

      // Create a read/writable file channel

      File file = new File("filename");

      FileChannel channel = new RandomAccessFile(file, "rw").getChannel();


      OutputStream os = Channels.newOutputStream(channel);


      InputStream is = Channels.newInputStream(channel);