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)

Generating Ext JS and Java CRUD Applications with CDB

Clear Data Builder for Ext JS (CDBExt) is an open source tool that automatically builds Ext JS/Java EE CRUD applications given one or more annotated Java interfaces. The generated JavaScript and Java code enforce best Ext JS and Java EE practices and is deployed on the development version of the Tomcat ready to run. A tiny library of Ext JS components accompanying CDBExt – Clear components – enables transactional data sync with the application server, including deeply nested hierarchical data transaction, features not supported in native Ext JS 4. This short video opens a serie... (more)

User Experience Professional Is Needed Badly

What would you think if a person visited your training registration page shown below and asked you the following question, “Yakov, when the early bird price for your JavaScript training expires?” A not so savvy Web person could’ve reacted like this, “Helloooo, can’t you read? Sales end on May 29, 2012 ”. But being in the Web business for a while, I’ve responded politely, “The sale end date should be listed on the registration page.” That person was polite too and he replied, “Thanks. It wasn’t on the iOS version of that page”. Sure enough, the iPhone version of this page doesn’... (more)

What the Title “Senior Developer” Really Means

When I post a job opening for a Senior Java Developer, people send me resumes, and their titles match my post title. But the meaning of the word “senior” varies depending on the geography. Here in the USA a 22-24y.o. person graduates from college and starts as an intern or a junior programmer working his way up the career ladder. By his 28th birthday or so, a hard working person may qualify for the title Senior Developer.  Having said this, I realize that there are prodigies who became seniors in elementary schools, but they never send me their resumes anyway. In the countries t... (more)

Are You Using Abstract Classes, Polymorphism, and Interfaces?

If the answer is no, at a minimum your project needs a code review. Let's work on the following assignment: a company has employees and consultants. Design classes with and without the use of inheritance to represent the people who work for this company. The classes should have the following methods:   changeAddress promote giveDayOff raiseSalary Promotion means giving one day off and raising the salary by a specified percentage. For employees, the method raiseSalary should raise the yearly salary and, for consultants, it should increase their hourly rate. Abstract Classes A clas... (more)