there's no centralized or unified way to include those files, every part of the software uses those files from different places, namely core and plugin. 

Based on the TIOBE Index for June 2016 Java is now more well-known than a variety of widely-used programming languages, including C++, Python, C#, PHP and JavaScript. The statistics on usage posted on various websites illustrate the immense popularity and importance of Java in the present day world. Java is an all-purpose programming language. Certain developers prefer to use Java to build desktop GUI applications as well as other developers create numerous web-based applications using Java technologies. In addition, Java is also used extensively for the development of mobile applications and games for Android which is the mobile platform with the biggest user base. There are plenty of reasons that Java is going to be a major factor over an extended period of time.

Visit: Java Course in Pune