Code reuse is one of the most important factors in software development. It is a VERY good idea to put frequently-used functions together and build a library for yourself. Whenever some method is used, just simply make a method invocation. For Java, it’s straightforward to manage such a library. Here a simple example in Eclipse. The library will contain only one “add” method for demo purpose.
Step 1: Create a “Java Project” named as “MyMath”, and a simple “add” method under “Simple” class.
Package structure is as follows:
