How To Learn Java Programming For Beginners

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How To Learn Java Programming For Beginners – Before you start learning Java, there are some requirements that must be met. First, you must have a basic understanding of how to use a computer, how to install software on a computer, and how to do basic configuration in the operating system (for example) to set environment parameters. Second, you need to be comfortable with searching things on Google and following online tutorials, first you can easily find most of the things you need online. Finally, knowing English is a big advantage because you can find many tutorials, courses and useful information in English.

We begin by learning the basic structure of Java and the syntax of the language. At this point, you should learn the basics of using Java such as creating classes and main methods, declaring parameters and methods, and using control structures. We continue to learn about data types and collections, which are the basic building blocks of any programming language.

How To Learn Java Programming For Beginners

How To Learn Java Programming For Beginners

After completing the basics, we should consider object-oriented programming (encapsulation, inheritance, abstract classes, interfaces, and polymorphism), one of the defining features of the Java programming language. Every other aspect of Java is related to object-oriented programming in some way so make sure you spend enough time on it.

What Is Java Programming?

We continue with data flow and exception management. This will allow us to read and write data from the file and properly handle unexpected conditions or behavior in our code.

Generics represent the type safety feature in Java, and although we are less likely to implement generic types, many libraries in Java are based on genetics. Therefore, it is very important to have a good understanding of how this feature works.

Finally, the last part of basic Java is about using collections. Collections provide functionality for storing objects, iterating through them, sorting and retrieving objects, all of which are widely used in Java applications.

In order to better understand the main aspects of Java, it is recommended to do a set of practical exercises that will enable you to use all the features you have learned. Our advice is to find Java interviews and practice problems and do as many as you can. If you find it difficult to find suitable exercises, you can start with: Fizz-Buzz, Palindrome, Running a quick sequence, Counting the numerical value of a number.

Getting Started With Java In Visual Studio Code

After completing the training exercises, we can proceed with the basic libraries provided by Java. First, you should dedicate at least a few days to learning SQL (Structured Query Language) and practicing in a database management system (we recommend PostgreSQL or MySQL). After that, we need to learn JDBC (Java Database Connectivity) to make our Java program interact with the database to store and retrieve data. Other functional libraries provided by Java thread use (for parallel execution) and network programming (for creating client-server applications and working with URLs).

In some cases, depending on the type of work you do or plan to do, and the time you need to invest in learning Java, it may also be useful to work with a UI library such as Swing or JavaFX.

At this point we should focus on learning principles and practices related to software development. It will help us to use Java programming language effectively and efficiently. We start by learning about software development principles: Solid, Dry, Yagni, and Kiss. After this we focus on unit testing and clean code practices. Finally, after understanding all this and doing well, let’s focus on the concepts that software developers use every day: code review, modern methodology, source control (we recommend GIT), and dependency management (we recommend Maven).

How To Learn Java Programming For Beginners

This is the most difficult stage of the learning process, as it has the largest number of topics to learn. We begin by familiarizing ourselves with the nature of web applications, focusing in particular on the client-server concept and learning HTML and CSS, which allow us to create static web pages. At this point, although not necessarily obvious, most Java developers also learn the basics of JavaScript.

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We develop Java Enterprise concept knowledge – JDK – part of the Java Development Kit for developing web applications. At this point we should cover the following topics: Services, Java Server Pages (JSP), Java Server Faces (JSF), Filter and Web Server. Also, if we practice with application servers (such as Tomcat and Glassfish), we can handle SOAP web services and business Java beans (but more at a conceptual level because these libraries are rare in modern software development).

After having a solid understanding of all the basic concepts of Java web development, we can start learning Spring by focusing on building REST APIs using Spring Boot, Inversion of Control, Spring MVC, Spring, Java Persistence API (JPA) and Java Messaging. . . JMS). All of these are part of the Spring framework, and allow fast and easy web development (compared to corporate libraries and standard Java frameworks). Finally, we’ll learn how to secure our web application using Spring Security, focusing on implementing security using Java Web Token (JWT) and OAuth2.

At this point, you should have enough knowledge to build back-end applications using Java. You should try to implement projects that are small in size but relatively complex, making sure that you go through all the layers of the application, from the user interface to the actual database. Trying to implement a project from scratch gives you an idea of ​​how specifications work, how to plan and develop a project, and how each part of the Spring Framework fits together to create a complete web application. We recommend that you prepare each project more diligently, including clean code, unit testing, and development principles to better understand how these concepts fit into the context of web development.

In this step we will focus on the requirements and aspects of software development. We will learn how to gather specifications and requirements (functional and non-functional) and then learn the principles of creating a system that meets these requirements. We will learn which technologies, frameworks and libraries are best suited for performance, parallel processing, large amounts of data (either a large number of input operations or a large number of reads), data warehousing, business intelligence and security. At this point we will focus on learning and understanding the best practices of the many systems and technologies we have learned along the way.

Learn The Basics Of Java Programming

An important aspect of system design is to identify the inputs and outputs of the system components and to design a logical flow (components that make up) that lead from a given input to a desired output. This process greatly affects software systems designed with non-functional requirements.

Although there are many factors to consider, at this stage you will have many years of experience in the same company and you are likely to focus on technologies and projects that best suit the company you are working for, leading to creation. Expertise in system design (if desired).

Edit Later Depending on the nature of your work, the needs of your project and the team you work with, at this stage you should also learn about these concepts: NoSQL (we recommend MongoDB, Cassandra and Elasticsearch), cache (we recommend EhCache and Redis) and streaming events (We recommend Kafka).

How To Learn Java Programming For Beginners

As we work on system design, we expand our knowledge and understanding of web applications by learning principles and standards that apply to service-oriented architecture, domain-driven architecture, and microservices. This is not considered a standard in the industry or in the Java world, but this concept has gained more and more popularity in the last decade, and it is more likely to use them in your company and the project you are working on.

Top 10 Free Resources To Learn Java Programming Online. Java Tutorials, Resources, And Courses.

The convergence of SOA, DDD, and microservices creates the need to learn at least a conceptual level about cloud infrastructure, containers, container management (we recommend Docker, Docker Compose and Kubernetes), load balancers, and API gateways. We recommend Amazon API Gateway, Mashery, and Nginx). At the code level, you should have experience with fan clients (we recommend Eureka and Pita from Spring Cloud).

The last step in the Java roadmap is about system architecture and learning how to create a complex system architecture that can combine multiple projects, each with its own requirements and specifications. Software architecture includes, but is not limited to, the following aspects of software development: hardware used, deployment, infrastructure, scalability, technology, security, components, services, layers, and interactions of software system components.

We have various options based on concepts and practices that we can learn at this stage, but as with system design, we prefer.

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