Beknazar – Medium

Mar 31

Design Patterns

In this article, we will go over some common design patterns with Java. The design patterns are a common way of solving common problems. Singleton Pattern. Immutable Object Pattern. Builder Pattern. Factory Pattern. Singleton Pattern In some scenarios, we want to have only one instance of a particular class. That single instance…

Java

5 min read

Mar 31

Lambda In Java

Agenda: Understanding Lambda Expressions and its syntax. Built-in functional interfaces. Understanding Lambda Expressions and its syntax Starting from version 1.8 Java supports Lambda Expressions. Java is an object-oriented programming language, however, lambda is adding some functional programming features to java. It is mainly the ability to pass a method as an argument to another method. Let’s…

Java

4 min read

Mar 30

Map in Java

The map is a set of key-value mappings. The keys are unique.

Java

2 min read

Mar 30

Set in Java

We will take a look into java.util.Set in this article. The Set is part of the collections framework in Java. It is an interface and it has three main concrete classes. Set doesn’t allow duplicates.

Java

3 min read

Dec 20, 2021

Unit Testing in Java

Every program needs to be tested. There are many types of testings out there. Today we are going to talk about unit testing. Unit Testing. JUnit. TDD. Unit Testing The software consists of many units with specific logic. Unit testing is a type of testing that tests each unit separately to verify…

Unit Testing

4 min read

Dec 15, 2021

Generics in Java

Generics let us abstract the type of the object. Generics were introduced in java 1.5. Agenda for this article: Generics Overview Generic Methods Bounds Wildcards Generics Overview Let’s have an example List list = new ArrayList(); list.add("apple"); list.add("kiwi"); In the above example, we used List without using generics. When type is not…

Java

5 min read

Dec 7, 2021

Multithreading in Java

Multithreading or concurrency is one of the hardest topics to learn. In addition, the issues due to the multithreading are most annoying and difficult to locate. All right, this is our agenda for today. Understanding Thread Concurrency. Multithreading with Thread Multithreading with Runnable Multithreading with ExecutorService Understanding Thread Concurrency I want to start…

Java

6 min read

Oct 7, 2021

Reflection & Annotations — The Powerful Combination

We tag our method with @Test and it becomes JUnit or TestNg unit test. We tag our class @Controller and it becomes a controller class in Spring. In this article, we will try to understand the background of these kinds of features in java. Inversion of control To get started with our discussion…

Java

5 min read

Reflection & Annotations — The Powerful Combination

Sep 22, 2021

Annotations in Java

Annotations are the way we can add metadata to class declaration, variable declaration, and methods. We can tag our code with annotations to provide extra information. @Override public void run() { System.out.println("running.."); } That’s how the annotation looks like. We put the annotation name after @ character. @Author(…

Java

4 min read

Sep 20, 2021

Reflection in Java

Today we will talk about reflection in Java. The main credit and source used for this article is an official oracle article. Reflection is when code can reflect a source code or we can say when code can read itself. By using reflection we can find out about members of…

Java

4 min read