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)
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)
(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)
This article was originally published in print on December 3, 2003"Eclipse
represents the worst of Java"
Lately, there's been a lot of guff spouted about how Sun isn't joining
Eclipse. While I understand the bitterness aimed at Sun somewhat, I think
that this particular brand of talk is counterproductive and, dare I say it,
wrong. The talk tends to center around the concept of NetBeans and Eclipse
using common technology, and I think this is misguided, and here's why.
I really dislike Netbeans. I think it blows goats from here to Sussex, and
considering that I live in the middle of the US, that's a lot of goats. Given
the choice between NetBeans and... Notepad, I usually spend a minute
pondering whether I can keep remembering to check extensions on filenames
before realizing that I can, and I end up with sucky ol' Notepad instead of
bothering with NetBeans.
That sai... (more)
The Datapower appliances support the use of the FTP protocols for message
transport. The purpose of this article is to present number of common use
case scenarios for FTP polling, illustrating correct configurations of the
device to support the use case.
The use case scenarios are as follows:
1- FTP Poller - polling files in one directory and transfer them to another
directory
2- FTP Poller – polling files from FTP SERVER and forward them to another
service
3- FTP Poller (sFTP – FTP over SSL) - polling files from FTP SERVER and
forward them to another service
4- FTP Poller (sFTP – FTP over SSH) - polling files from FTP SERVER and
forward them to another service
1- FTP Poller (Simple)
In this scenario, the Datapower device performs the following tasks:
a- Polling files in one directory (/get) and transferred to another directory
(/put) with the same file name on... (more)
It seems that lately lots of writers have been bashing Java. Some people seem
to think that Java has stagnated, and that the "hyper-enthusiasts" have left.
Well, the rest of us are just quietly coding on a platform that is more
exciting than ever. Other technologies like Ruby, PHP, .NET, or AJAX might
get more hype and acclaim lately, but hype aside, Java still produces the
majority of innovation in the software profession.
You can get a sense of Java's health by simply looking at how many projects
are out there using Java. Pop on over to Sourceforge and look at the number
of projects by language:
http://sourceforge.net/softwaremap/trove_list.php?form_cat=160.
Certainly Sourceforge is not the final measure, but it's a reasonable reality
check. Anyway, you'll find 17300+ Java projects, the most of any language.
That's more than PHP (12675), Ruby (425), and .NET (3094... (more)
Yakov Fain's Blog
If you are an active and serious software developer, you have to make sure
that your technical skills are not getting rusty. You need to get trained. In
our trade the rule of the game is that you constantly have to be in a good
technical shape. Your other choice is to keep complaining about outsourcing.
Excuses like we are in a crunch situation with our project at the moment, and
this is not a good time for studying are good for amateurs.
Can you afford to take just one day off, get out of your cubicle and see what
other people up to these days? Is J2EE still in favor? What’s this ESB
is about? Have you even heard of using Flex as a Web front end of your Java
applications?
Do not miss an event in NYC this Monday, that is created for people who think
that they are way too busy to take several days off and spend them in the
class. Just take one d... (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)
PowerBuilder 11 deploys entire applications as .NET Windows Form or Web Form
applications and deploys individual components as .NET Assemblies and as .NET
Web Services. Version 11 consumes resources of the default .NET framework as
well as resources of custom developer-defined .NET resources.
Non-PowerBuilder .NET solutions can interoperate with, and take advantage of,
the unparalleled productivity of PowerBuilder’s data access and data
manipulation capabilities. In short, PowerBuilder 11 creates as well as
consumes .NET resources.
Once PowerBuilder 11 has deployed an application or a component as .NET, the
developer can begin taking advantage of external .NET resources on a scripted
basis through PowerScript enhancements. The scripted .NET interoperability in
PowerBuilder 11 is predicated on a new conditional compilation feature.
Conditional compilation allow... (more)
JDBC at Cloud Expo
If your systems require constant accessibility, you know that application
failover is an essential function for automatically and transparently
redirecting requests to an alternate server in the case of a failure or
downtime. Several options exist for ensuring high availability for your
mission-critical applications. Those options may be hardware- or
software-based, and may also vary considerably in terms of project or
enterprise scope and in terms of cost and complexity. Chances are you're
relying on one or more such options. But are you aware that the database
driver software you use can make application failover much easier and
cost-effective to implement, configure, and manage application failover?
High availability solutions are typically complicated and expensive to code.
With an application relying on an Oracle data source platform, for exa... (more)
Java EE PaaS Growth & Interoperability Concerns
As observed in my earlier articles, the Java EE PaaS portfolio is gaining in
strength each day, with support from major players such as IBM, Oracle,
VMWare, Redhat , Google and Amazon.
However unlike the Microsoft > .NET Framework > Azure PaaS equation where
there is just one version of the framework from one vendor, the openness of
Java EE led to several implementations of application server-specific
implementations.
As Java EE standards define a core set of API, frame works and features as
part of its implementation, an application server is the container that
executes these instructions and provides a development and runtime platform
for Java EE applications.
While application servers are expected to implement the Java EE
specifications & technologies like (SERVLETS, JAVA SERVER FACES, ENTERPRISE
JAVA BEANS, PERSI... (more)
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