Preparing for an interview? Want to just revisit Java SE 7 features? Trying
to recollect or revise a Java SE programming construct? Let me take you back
in time to what was introduced first in Java SE 7? Join me for this tutorial
series on Java as we all eagerly await the official release of Java SE 9.
Java SE 7 Release Date: 28-07-2011
Java SE 7 Code Name: Dolphin
Java SE 7 Highlights
Strings in switch statements. Automatic resource management in try
statements. Improved type inference for generic instance creation, AKA the
diamond operator <>. Simplified varargs method declaration. Binary integer
literals. Allowing underscores in numeric literals. Catching multiple
exception types and rethrowing exceptions with improved type checking.
I have provided some of the most important core language enhancements for JDK
7.0, along with code samples. The examples provided bel... (more)
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)
(LinuxWorld) — One of my non-profit Web sites, VarLinux.org, ran on my
modified version of the PHP-Nuke weblog package from the site's inception in
March 2001 until late November 2002. I chose PHP-Nuke as a starting point
because I was very impressed with it. However, the more I learned how to use
PHP, the more I realized that PHP-Nuke was not only a tangled mess but that I
had made it even worse with my modifications. A year later, I was faced with
the fact that VarLinux.org was not only lame because it was based on
PHP-Nuke, it was also showing its age. It lacked features of other weblogs,
and still lacked many of the features I had intended to add to the site.
If I were going to fix the code, the first thing I would do would be to make
it an object-oriented system. I toyed with the idea of converting my code
into OOP-based code, but I concluded that if the P... (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)
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)
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)
"We've seen the Web moving from a publishing paradigm to an e-business
paradigm to an AJAX paradigm." That is the considered verdict of IBM Software
Group's CTO of Emerging Internet Technologies, David Boloker. And he's right:
AJAX is here, it's growing, and it's (potentially) the biggest thing to hit
the i-Technology world since Java.
For those who dislike talk of "paradigm shifts" and suchlike, on principle,
let's examine why this particular shift is more than just marketeering, for
once.
For a start, it's not new...only the name is. Which means that the AJAX
approach - for it is more an approach than it is a technolog in itself - is
in fact already tried and true.
Secondly, its naming last year - by Jesse James Garrett (pictured), of
Adaptive Path - has caught on not because the i-Technology world needed
another acronym - it surely doesn't - but because it is the... (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 the giga-merger, to beat the mere
mega-mergers of 2007?
At the end of each year, SYS-CON informally polls 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, and within what kind of
time-scale. Enjoy!
RIAs Versus AJAX o Ruby on Rails o PHP o Facebook Competitors
Tim Bray
Director of Web Technologies
Sun
Tim Bray managed the Oxford English Dictionary project at the Univers... (more)
EJB. JSP. JMS. JMX. JCA. JTA. JAAS. JAXP. JDBC. JNDI. This is a partial list
of the acronyms you'll find in the 228-page J2EE v1.4 public draft. Of
course, I was able to assemble this list of acronyms before I reached the
bottom of page six.
This new version of J2EE is presented as the Web services version, so to be
fair I should add SOAP, SAAJ, JAX-RPC, and JAXR to this list. In this age of
integration, I wouldn't feel right if I didn't include JCA and JACC. I also
feel obligated to at least mention the unfortunate specifications that were
absent the day acronyms were handed out, like servlets, JavaMail, J2EE
management, and J2EE deployment.
If this list of acronyms overwhelms you, I apologize. I do have a suggested
course of action that will help you become educated in J2EE 1.4. Each one of
the aforementioned acronyms is a specification unto itself, so all you hav... (more)
Graphical user interface (GUI) testing is a potentially problematic area
because constructing effective test cases is more difficult than the
corresponding application logic. The roadblocks to effective functional GUI
testing are:
Traditional test coverage criteria like "80% coverage of the lines of code"
may not be sufficient to trap all the user interaction scenarios. End users
often use a different user task interaction model than the one conceived by
the development team.
Functional GUI testing needs to deal with GUI events as well as the effects
of the underlying application logic that results in changes to the data and
presentation.
The common methods for functional GUI testing are the "record and execute"
script technique and writing test programs for different scenarios. In the
"record and execute," the test designer interacts with the GUI and all the
eve... (more)
I was reading Glen Cordrey's last J2ME column in this month's issue of JDJ.
Glen mentions that, as the J2ME market has not matured with enough jobs, he
is going back to J2EE and try to work on mobility integration issues in
enterprise projects.
I complete agree with him and in fact, this is the point I have always
advocated in my writings. My keyword for mobility has always been
"end-to-end."
Although my experience with the J2ME job market is somewhat different from
Glen's (I have to turn down new J2ME contracts to keep myself sane at this
point), I understand that not everyone in J2ME had the same luck. Most of the
"real" employment opportunities are still on the enterprise server side.
But when we look at the future, I see three trends: The move to mobility is
inevitable in the enterprise. The IT revolution has to reach hundreds of
millions of mobile workers in orde... (more)
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