Factory Design Patterns in Java

What kind of problem does the factory design pattern solve? Why use the factory design pattern in Java?

We know what you are thinking -  Why use factory design pattern in Java? For a start, classes in java or any other object-oriented programming language are generally written in a way that leads to coupling problems, unless design patterns are used. Subclasses get highly dependent on each other when the code gets larger and larger and that is where the real problem begins. If that class needs some extra methods or maybe a new feature class is to be added, figuring out the modifications to be made to that class will take a lot of time because chances are high that making a simple change to a class may have rippling effects, as they might need changes as well (even the main class may not look the same again after making changes). This cannot go on forever and we need some elegant way to avoid such a situation.

Long story short – Why use a factory design pattern?

Answer: Following the factory design pattern can help solve the dependency issues.

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Take a look at the code below, the DrinkCafe class has a createDrink method that does all sorts of stuff from choosing a drink to creating one and then finally returning it.