CountDownLatchCountDownLatch can be used in synchronizing behavior among threads, it makes one or more threads wait for some actions in other threads to be completed. It has a property count which defines how many countDown() need to be called before other threads which called await() to be waked up. When a thread calls CountDownLatch.await(), the thread will be blocked until the value of count becomes 0. The initial value of count can be specified when creating the CountDownLatch instance. Every time when CountDownLatch.countDown() is called, the value of count will decrease by 1 until t...

Do you really understand how Java does the integer comparison? OK, ignore the statements in the post title. What we are interested in is another set of comparison statements. Let's first see below code snippet.public class IntegerComparison { public static void main(String[] args) { Integer a = 127, b = 127; Integer c = 128, d = 128; System.out.println(a == b); System.out.println(c == d); }}What do you think the output will be? Are they both displaying true? You will find out the answer after reading through how Java optimizes some of the integer comparison logic.First, you need to un...

Programmers are always high in demand in software industry: take any corporate blue chip Software Company India for instance; programmers are playing a pivotal role in company’s business and relevant growth. In that case if you are planning to pursue a programmer’s career and earn fat package, here goes the range of option for your further study.Alternatively, if you are an employer and you want to understand the basic idea of coding, the outline description of popular programming language will give you extra leverage for doing recruitment, coordination with your team, etc. Ja...

If there is one debate that never dies in the language community then it is this: Who’s the winner: Python Vs Java, C/C++. Obviously each has its own pros and cons, but in which language do the pros outnumber the cons or which language has better cons than others! For some it just comes down to familiarity, they like what they like! The Numbers But as far as the rest of the language world goes, the debate is still out there. By last count, Java, C and C++ were still winning. According to the Tiobe language popularity index, Java, C and C++ still take the top three counts. ...

Without even a pinch of doubt, the labor market across the globe has turned highly competitive. So, there goes a rat race where the best recruiters vie to hire the most potential candidates. Let's say you need to hire Java developers. Certainly, your hiring challenge would be to find applicants with niche skills. Sadly enough, the traditional hiring methods are detrimental to getting the creme of the talent pool. It's time-consuming and involves a lot of manual and paperwork, wherein there are companies which have already adopted the trendy approaches to recruitment thereby attracting the skil...

Most enterprises today are application centric. But the problem with the application is that their database schemas, user interfaces, programming interfaces and object models are tightly coupled and difficult to change. If you want to add a new field to a database table and you’re lucky, the change will reflect through the entire system. But often the change needs to be replicated manually across the entire system. And as applications are difficult to change, adding business rules or process to the application does not facilitate business agility. This is where layered architecture comes...

The original Java 9 planned release date is March 2017. But latest source shows that Java 9 release will be delayed again to July 2017. It's four months later than the planned date.Oracle Chief Architect of Java Platform group Mark Reinhold proposes this new release date in a message sent on the OpenJDK mailing list. Despite this progress, at this point it's clear that Jigsaw needs moretime. We recently received critical feedback that motivated a redesignof the module system's package-export feature [5], without which we'dhave failed to achieve one of our main goals. Ther...

Do you know what value will be printed when following program is ran?class Test { public int aaa() { int x = 1; try { return ++x; } catch (Exception e) { } finally { ++x; } return x; } public static void main(String[] args) { Test t = new Test(); int y = t.aaa(); System.out.println(y); }}And before answering the above question, do you have answers to following questions?If there is a return statement in try block, will the finally block be executed when the return is executed?If finally will be exe...