Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Mail Systems
Eclipse Documentation

How To Guides
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Problem Solutions




Thinking in Java
Prev Contents / Index Next

Data manipulation with buffers

The diagram here illustrates the relationships between the nio classes, so that you can see how to move and convert data. For example, if you wish to write a byte array to a file, then you wrap the byte array using the ByteBuffer.wrap( ) method, open a channel on the FileOutputStream using the getChannel( ) method, and then write data into FileChannel from this ByteBuffer.


Note that ByteBuffer is the only way to move data in and out of channels, and that you can only create a standalone primitive-typed buffer, or get one from a ByteBuffer using an “as” method. That is, you cannot convert a primitive-typed buffer to a ByteBuffer. However, since you are able to move primitive data into and out of a ByteBuffer via a view buffer, this is not really a restriction.
Thinking in Java
Prev Contents / Index Next

   Reproduced courtesy of Bruce Eckel, MindView, Inc. Design by Interspire