- Solid principles tutorial how to#
- Solid principles tutorial software#
- Solid principles tutorial free#
Solid principles tutorial how to#
When to use Command Design Pattern in Java ( example).7 Best Books to learn the Design Pattern in Java? ( books).Difference between Factory and AbstractFactory Pattern? ( example).How to design a Vending Machine in Java? ( questions).5 Free Courses to learn Object Oriented Programming ( courses).Other Object-Oriented Programming tutorials you may like Keep your number of classes and package small. import it's one of the most basic and useful OOD principles, you should not get carried away with this, don't take it to the level, where you end of with many small classes. You can call the addGroundCoffee method to refill ground coffee, and the brewFilterCoffee method to brew a cup of filter coffee. It only implements a constructor and two public methods.
The implementation of the BasicCoffeeMachine is quite simple. If you build a coffee machine application that automatically brews you a fresh cup of coffee in the morning, you can model these machines as a BasicCoffeeMachine and a PremiumCoffeeMachine class. Rather simple ones that use water and ground coffee to brew filter coffee, and premium ones that include a grinder to freshly grind the required amount of coffee beans and which you can use to brew different kinds of coffee. You can buy lots of different coffee machines. Brewing coffee with the Dependency Inversion Principle Let’s take a look at the CoffeeMachine project in which I will apply all three of these design principles. Your implementations should follow the Liskov Substitution Principle so that you can replace them with other implementations of the same interface without breaking your application. The interface itself is closed for modification, and you can easily extend it by providing a new interface implementation. You can achieve that by introducing interfaces for which you can provide different implementations.
Solid principles tutorial software#
The Open/Closed Principle required a software component to be open for extension, but closed for modification. If you consequently apply the Open/Closed Principle and the Liskov Substitution Principle to your code, it will also follow the Dependency Inversion Principle. This might sound more complex than it often is.
Definition of the Dependency Inversion Principle