Java technology is still the most sought after in the world of technology (software) because the whole Android World and other applications are also based on this.

There are some common reasons are for making the popularity of Java in IT Sector like as-

1). More highly and secured language.

2). Java is a pure Object Oriented Programming Language.   

3). Even before the arrival of android operating, many mobile companies have been using Java-based operating systems and their applications.

4). In the Gaming world, mostly java is used for its development.

5). Making Highly Secured web application in Java.

etc.

So java is the most demandable in the IT sector.