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Yakov Fain

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Top Stories by Yakov Fain

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)

A Cup of AJAX? Nay, Just Regular Java Please

These days everyone is talking about AJAX. It’s supposed to be a cool way of creating Web applications. The idea is noble: instead of rendering an entire HTML page on each little change on the page, it’s much better to send an asynchronous request that will  get the data for you and refresh only the relevant portion of the screen. Every author writing on AJAX is giving the same (the only? ) example where this technology is being used: Google maps and email. (BTW, I’m a little sick of these examples). Since I’m not going to be helping Google in improving their maps, I’d like to se... (more)

Rich Internet Applications with Adobe Flex 2 and Java

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 N... (more)

Teaching Kids Programming: Even Younger Kids Can Learn Java

My solution to the problem? I've written my own e-book on it: Java Programming for Kids, Parents and Grandparents. Dave became my first kid student and this has helped me a lot to understand the mentality of the little people. This is what I've learned while working on this project: Most of the programming tasks require minimal knowledge of arithmetic and algebra skills. To start programming, a kid needs to understand what x = y+2 means. Another important concept to understand is an if statement.   Kids develop the abstract reasoning abilities by the fourth-fifth grade, and they... (more)

Reading Data from the Internet

To read local file streams, a program has to specify the file's location, i.e. "c:\practice\training.html". The same procedure is valid for reading of the remote files: just open the stream over the network. Java has a class URL that will help you to connect to a remote computer on the Internet. At first, create an instance of the class URL: try{ URL xyz = new URL("http://www.xyz.com:80/training.html"); } catch(MalformedURLException e){ e.printStackTrace(); } The MalformedURLException could be thrown if a non-valid URL has been used, for example missed protocol if you forgot to sta... (more)