268Chapter9 • Platform Independent Development with Java
It is interesting to note that a non-blocking I/O library was available in the open source
before it is included in SDK version 1.4. You can find more information about this open source
implementation at http://www.cs.berkeley.edu/~mdw/proj/java-nbio/.
9.4.1.2Security Enhancements
Many new features have been added for security enhancements to the SDK and some
existing features are refined. These features include Java Certification Path API, Cryptography,
Java Authentication and Authorization Service security extensions, GSS-API with Kerberos
support and so on.
9.4.1.3Web Services
J2SE version 1.4 lays foundation for XML-based web services. Now the XML is part of
the core platform which allows building interoperable web applications and services.
Different building blocks for Java platform standard edition version 1.4 are shown in Fig-
ure 9-1 taken from the Sun Microsystems web site.
Figure9-1 Building blocks of J2SE version 1.4.