| Source File | Description | 
| Grep.java | Searches a list of files for lines that match a
given regular-expression pattern. Demonstrates NIO mapped byte
buffers, charsets, and regular expressions. | 
| Sum.java | Computes 16-bit checksums for a list of files.
Uses NIO mapped byte buffers for speed. | 
| TimeQuery.java | Asks a list of hosts what time it is. Is a simple,
blocking program that demonstrates NIO socket channels (connection
and reading), buffer handling, charsets, and regular
expressions. | 
| TimeServer.java | Listens for connections and tells callers what
time it is. Is a simple, blocking program that demonstrates NIO
socket channels (accepting and writing), buffer handling, charsets,
and regular expressions. | 
| Ping.java | Connects to each of a list of hosts and measures
the time required to complete the connection. Uses a selector and
two additional threads to demonstrate non-blocking connects and the
multithreaded use of a selector. | 
| NBTimeServer.java | Implements a non-blocking Internet time
server. | 
The NIO.2 examples in the following table can be accessed in
your JDK 7 installation under
<JAVA_HOME>/sample/nio.
| Source File | Description | 
|  | 
| file/Chmod.java | Changes the permissions of files in a manner
similar to the chmod(1) utility. | 
| file/Copy.java | Copies files in a manner similar to the cp(1)
utility. | 
| file/DiskUsage.java | Prints out disk space information similar to the
df(1M) utility. | 
| file/FileType.java | Prints out a file's type. | 
| file/WatchDir.java | Watches a directory (or tree) for changes to
files. | 
| file/Xdd.java | Lists, gets, and deletes the user-defined
attributes of a file. | 
| multicast/MulticastAdress.java | Parses and represents a multicast address. | 
| multicast/Reader.java | Reads a message from a multicast datagram. | 
| multicast/Sender.java | Sends a message in a multicast datagram to a given
group. | 
| server/README.txt | This directory contains a simple NIO-based
HTTP/HTTPS server example. See the README.txt file for further
information. |