Here CustomerDaoImpl is hardly depended on MySQLDatasource so if we want to switch MySQL to … In object-oriented design, the dependency inversion principle is a specific form of decoupling software modules. Let's take an example of a simple Customer Management example. First dependency Inversion Principle(DIP) and second Inversion of Controls(IoC). The main motto of the dependency inversion … D stands for DIP ( Dependency inversion principle) Originally compiled by Robert C. Martin back in the 1990s, these principles provide a way to construct software components that are tightly coupled code with poor cohesion and little encapsulation to the complete opposite; loosely coupled code, cohesive and truly encapsulating the real needs of the business appropriately. Details should depend upon abstractions. Robert C. Martin said that "High-level modules should not depend on low-level modules. Dependency inversion talks about the coupling between the different classes or modules. The MySQLDatasourceclass object is created using new keyword in CustomerDaoImpl. Then finally we will discuss see how can we implement Dependency injection. Dependency inversion principle is one of the principles on which most of the design patterns are build upon. once we have discussed these two, we will be in a better position to understand Dependency Injection, so we will look at dependency injection in details. Dependency Inversion Principle Example. It focuses on the approach where the higher classes are not dependent on the lower classes instead depend upon the abstraction of the lower classes. Abstraction should not depend upon details. Using abstractions (i.e., interfaces in Go) was intuitive to me. Both should depend on abstractions. The Dependency Inversion Principle (DIP) states that high level modules should not depend upon low level modules. Secondly, abstractions should not depend upon details. 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