Adaptor Pattern In Java

Adapter pattern example consider a scenario in which there is an app that s developed in the us which returns the top speed of luxury cars in miles per hour mph.

Adaptor pattern in java. Adapter pattern works as a bridge between two incompatible interfaces. Java util arrays aslist java io inputstreamreader inputstream returns a reader java io outputstreamwriter outputstream returns a writer that s all for adapter design pattern in. Class diagram of class adapter pattern. Adapter design pattern example in jdk.

This tutorial demonstrates how to use the adapter pattern in java focusing on use cases and types of adapters class object and two ways adapter patterns. Adapter pattern in java. Where to use adapter design pattern. Adapter is a structural design pattern which allows incompatible objects to collaborate.

This type of design pattern comes under structural pattern as this pattern combines the capability of two independent interfaces. This adapter pattern uses multiple polymorphic interfaces implementing or inheriting both the interface that is expected and the interface that is pre existing. Full code example in java with detailed comments and explanation. Since multiple inheritance is not supported by many languages including java and is associated with many problems we have not shown implementation using class adapter pattern.

As per the list of gang of four patterns adapter is a structural pattern much like proxy flyweight facade and decorator pattern in java. This pattern involves a single class which is responsible to join functionalities of independent or. Here instead of having an adaptee object inside adapter composition to make use of its functionality adapter inherits the adaptee. It is typical for the expected interface to be created as a pure interface class especially in languages such as java before jdk 1 8 that do not support multiple inheritance of classes.

Now we need to use the same app for our client in the uk that wants the same results but in kilometers per hour km h. If you want to read the system input through command prompt in java then given below code is common way to do it. After 3 years of work i ve finally released the ebook on design patterns. The adapter pattern deals with how the classes are composed to form larger.

Adapter design pattern class diagram. This article explains adapter design pattern in java with class diagrams and example code. The main use of this pattern is when a class that you need to use doesn t meet the requirements of an interface.