Hello everyone, today, we will learn an important design pattern which is often overlooked by Java developers. Yes, I am talking aboutthe Command patternwhich helps us write flexible and loosely coupled code to implement actions and events in our application. In short, the Command design pattern...
How to implement the Adapter design pattern in Java? There are two ways to implement the adapter design pattern in Java, one using inheritance, also known as the class adapter pattern, and the other using composition, also known as the object adapter pattern. In both cases, it is best to ...
import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.howtodoinjava.demo.dao.EmployeeRepository; import com.howtodoinjava.demo.model.Employee; import reactor.core.publisher.Flux; import reactor.core.publisher.Mono; @Service public class E...
A proxy object hides the original object and control access to it. We can use proxy when we may want to use a class that can perform as an interface to something else. Proxy is heavily used to implement lazy loading related usecases where we do not want to create full object until it ...
Let’s see how to implement the observer pattern in a Java application. 3.1. Architecture The following diagram defines a one-to-many dependency between objects so that when one object (the subject) changes state, all its dependents (observers) are notified and updated automatically. ...
within Jakarta EE and Spring Boot.Specifically, we will look at two ways to register a Java Servlet in Jakarta EE — one using aweb.xmlfile, and the other using annotations. Then we’ll register servlets in Spring Boot using XML configuration, Java configuration, and through configurable ...
we have to add a new if statement and implement the operation. 3. refactoring let’s explore the alternate options to replace the complex if statements above into much simpler and manageable code. 3.1. factory class many times we encounter decision constructs which end up doing the similar oper...
decide which technique (the slower but small memory footprint technique, or the more memory intensive, but faster technique). So first, we need to refactor our class as a singleton, because pluggable things require instantiated classes and a default singleton class to implement the default ...
Step 1: Go to Samsung Find My Mobile website and sign in using your Samsung account. Unlock Samsung Pattern Lock via Samsung Find My Mobile Service Step 2: Choose Unlock feature. And a window will pop up as below, click Unlock again to confirm. ...
How to Crack a Pattern Lock Fortunately, it’s easy to make it. In the following post, we will introduce 6 easy methods to help you unlock a Samsung phone if you forgot the pattern completely. These 6 methods can help youunlock pattern lockwithout losing data. Here we go!