JDJ's Enterprise Editor, Yakov Fain (pictured) writes: If you are planning to
hit the job market, you may need to refresh some of the Java basic terms
and techniques to prepare yourself for a technical interview. Let me offer
you some of the core Java questions that you might expect during the
interviews.
For most questions I’ve provided only short answers to encourage
further research. I have included only questions for mid (*) and senior
level (**) Java developers. These sample questions could also become handy
for people who need to interview Java developers (see also the article
"Interviewing Enterprise Java Developers").
Disclaimer. This article has been originally published three or four years
ago, hundreds of thousands Java developers have read it, but I still use some
of these questions while interviewing Java developers. Guess what? Every
other Jav... (more)
Related Links:
Wanted: 19 More of the Top Software People in the World Sung and Unsung
i-Technology Heroes Who's Missing from SYS-CON's i-Technology Top Twenty?"
Our search for the Twenty Top Software People in the World is nearing
completion. In the SYS-CON tradition of empowering readers, we are leaving
the final "cut" to you, so here are the top 40 nominations in alphabetical
order.
Our aim this time round is to whittle this 40 down to our final twenty, not
(yet) to arrange those twenty in any order of preference. All you need to do
to vote is to go to the Further Details page of any nominee you'd like to see
end up in the top half of the poll when we close voting on Christmas Eve,
December 24, and cast your vote or votes. To access the Further Details of
each nominee just click on their name. Happy voting!
In alphabetical order the nominees are:
Tim Berner... (more)
The editors of SYS-CON Media's Java Developer's Journal are in a unique
position when it comes to Java development. All are active coders in their
"day jobs," and they have the good fortune in getting a heads-up on many of
the latest and greatest software releases. They were asked to nominate three
products from the last 12 months that they felt had not only made a major
impact on their own development, but also on the Java community as a whole.
The following is a list of each editor's selections and the reason why they
chose that product.
Joe Winchester
Desktop Java Editor
SwingLabs
SwingLabs is an open source laboratory for exploring new ways to make Swing
applications easier to write, with improved performance and greater visual
appeal. It is an umbrella project for various open source initiatives
sponsored by Sun Microsystems and is part of the java.net community... (more)
The Web Tools Project (WTP) by the Eclipse Foundation is a set of open source
tools that substantially reduce the time required for the development of Web
applications, EJBs, and Web services. The WTP's current version is 0.7.1 and
version 1.0 is coming later this year. The framework provides wizards and
tools to create EJBs, Web components such as servlets and JSPs, and Web
services using the Axis engine. It also provides source editors for HTML,
JavaScript, CSS, JSP, SQL, XML, DTD, XSD, and WSDL; graphical editors for
XSD, WSDL, J2EE project builders, models, and a J2EE navigator; a Web service
wizard, explorer, and WS-I Test Tools; and database access, query tools, and
models.
In this article I'll show you how to develop and deploy a JSP Web application
with WTP in less than an hour. I'll also cover the creation and deployment of
a basic servlet and editing JSP ... (more)
I wonder how many people, as I did, found themselves thrown into confusion by
the death last week of Jean Ichbiah (pictured), inventor of Ada.
Learning that the inventor of a computer programming language is already old
enough to have lived 66 years (Ichbiah was 66 when he succumbed to brain
cancer) is a little like learning that your 11-year-old daughter has grown up
and left home or that the first car you ever bought no longer is legal
because it runs on gasoline in an age where all automobiles must run on
water. How can something as novel, as new, as a computing language possibly
already be so old-fangled that an early practitioner like Ichbiah can
already no longer be with us?
The thought was so disquieting that it took me immediately back to the last
time I wrote about Ichbiah, and indeed about Ada Lovelace for whom his
language was named. It was in the context ... (more)
Keith Lea writes of the benchmark, on his results page, "I was sick of
hearing people say Java was slow, when I know it's pretty fast, so I took the
benchmark code for C++ and Java from the now outdated Great Computer Language
Shootout and ran the tests myself."
Lea used G++ (GCC) 3.3.1 20030930 (with glibc 2.3.2-98) for the C++, with the
-O2 flag (for both i386 and i686). He compiled the Java code normally with
the Sun Java 1.4.2_01 compiler, and ran it with the Sun 1.4.2_01 JVM. He ran
the tests on Red Hat Linux 9 / Fedora Test1 with the 2.4.20-20.9 kernel on a
T30 laptop. The laptop "has a Pentium 4 mobile chip, 512MB of memory, a sort
of slow disk," he notes.
The results he got were that Java is significantly faster than optimized C++
in many cases.
"They also show that no one should ever run the client JVM when given the
choice," Lea adds. ("Everyone has the c... (more)
A typical Java developer knows that when you need to develop a GUI for a Java
application, Swing is the tool. Eclipse SWT also has a number of followers,
but the majority of people use Java Swing. For the past 10 years, it was a
given that Swing development wouldn't be easy; you have to master working
with the event-dispatch thread, GridBaglayout, and the like. Recently, the
NetBeans team created a nice GUI designer called Matisse, which was also
ported to MyEclipse. Prior to Matisse, JBuilder had the best Swing designer,
but it was too expensive. Now a good designer comes with NetBeans for free.
Why even consider Flex for developing Rich Internet Applications (RIA)?
First, we'll give the short answer. Just look at the code in Listing 1. This
code compiles and runs in the Flash player and produces the output shown in
Figure 1. Yes, it's a tree control with several no... (more)
JavaServer Faces (JSF) technology is a new user interface framework for J2EE
applications. This article uses the familiar Pet Store application to
demonstrate how to build a real-world Web application using JSF, the Spring
Framework, and Hibernate. Since JSF is a new technology, this article will
concentrate on the use of JSF. It presents several advanced features in JSF
development, including Tiles integration and business logic-tier integration.
Java Pet Store
The Java Pet Store is a sample application from the Java Enterprise
BluePrints program. It documents best practices, design patterns, and
architectural ideas for J2EE applications.
MyPetStore, the sample application for this article, is a reimplementation of
the Java Pet Store using JSF, Spring, and Hibernate.
I won't be able to cover all the features of the Pet Store in one article.
MyPetStore allows a user ... (more)
Since Eclipse's first release in 2001, it has become a popular environment
for Java development. In the period between March 10 and May 11, 2005, users
downloaded over 17,000 copies of one of the production SDK releases and over
3,500 copies of one of the stable (milestone) SDK builds on average every
day. A vibrant eco-system of developers, plug-in providers, authors, and
bloggers has grown up around it. Eclipse has also gained the backing of the
key Java vendors including BEA, Borland, IBM, SAP, and Sybase. Developers
like Eclipse because it provides a great platform for building Java
applications, and companies like it because it unifies their software tools
under one open source umbrella.
In late June of this year, the latest release of the Eclipse Platform,
version 3.1, will be available for download from eclipse.org. In this
article, I'll highlight some of t... (more)
Today's trend is to integrate existing systems in a standard way to make
disparate implementations interoperate. Web Services and XML came along with
the ability to provide a standard communication interface between these
systems, as well as the standard description language - WSDL - the Web
Services Description Language that lets those systems define the structure of
the services they're providing. Web Services are built using three classic
components:
SOAP - Simple Object Access Protocol - the XML-based communication protocol
for sending data using Web Services. WSDL - Web Services Description Language
- the XML-based language that describes the Web Service that's provided by a
particular system and how to access it. UDDI - Universal Description
Discovery Integration - a directory that helps to identify dynamically where
particular Web Services are and how to fin... (more)
2007 was undoubtedly the year of Social Networking, but what of 2008? Will
'08 be the year of "Unified Communications" or the year when CMS comes to
stand for "Community Management System" - or even "Collaboration Management
System"? Or will it be the year of a giga-merger, to beat the mere
mega-mergers of 2007?
As usual at the end of each year, SYS-CON has been informally polling its
globe-girdling network of software developers, industry executives,
commentators, investors, writers, and editors. As always, the range and depth
of their answers is fascinating, throwing light not just on where the
industry is going but also how it's going to get there, why, because of who,
within what kind of time-scale.
Enjoy!
RIAs versus AJAX . Ruby on Rails . PHP . Facebook Competitors
TIM BRAY
Director of Web Technologies, Sun
Tim Bray managed the Oxford English Dictionary projec... (more)
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