Performs a straightforward copy operation : FileChannel « File Input Output « Java

Performs a straightforward copy operation


import java.nio.channels.FileChannel;

public class Copy {

  public static void main(String[] args) {
    FileChannel in = null;
    FileChannel out = null;

    if (args.length < 2) {
      System.out.println("Usage: java Copy <from> <to>");

    try {
      in = new FileInputStream(args[0]).getChannel();
      out = new FileOutputStream(args[1]).getChannel();
      out.transferFrom(in, 0L, (int) in.size());

    } catch (Exception e) {



Related examples in the same category

1.Write to a file using FileChannel.
2.Using FileChannels to Access a File
3.Write to a mapped file.
4.Copy a file using NIO.
5.Get FileChannel from FileOutputStream and FileInputStream
6.Transfer between FileChannel
7.Read bytes from the specified channel, decode them using the specified Charset, and write the resulting characters to the specified writer
8.Demonstrates file locking and simple file read and write operations using java.nio.channels.FileChannel
9.Create a read-only memory-mapped file
10.Create a read-write memory-mapped file
11.Creating a Stream from a Channel
12.Create an inputstream on the channel
13.Create a private (copy-on-write) memory-mapped file.
14.A character output stream that sends output to a printer
15.Write file with FileChannel
16.Read file with FileChannel
17.Copy ALL available data from one stream into another with Channel
18.Copy file with FileChannel