Course JAVA 2.0.

Any modern project uses a version control system. The version control system allows you to keep track of all changes to your project, maintain a history of changes, and revert to a previous version of your project at any time.

To write quality software, knowing the syntax of a programming language is not enough – you need to follow certain principles. Principles like Single Responsibility, Do not Repeat Yourself will make large applications flexible and easy to maintain.

The three-tier architecture is the most common architecture used in applications. The clear division of the application at user level makes it easy to navigate and make changes without affecting or minimally affecting other tiers.

Inversion of Control is one of the main design patterns currently used to write Java applications. Using this model, you can easily develop an application of 1,000 classes or more. IoC is at the heart of the Spring Framework.

Spring Framework is the most common framework on which web applications, enterprise applications and microservices are built. The framework has become so popular that it is the de facto standard for web application development.

Databases are an integral part of applications. Relational databases allow structured storage of data, while the Structured Query Language (SLQ) programming language is suitable for working with databases to modify and enhance data in relational databases.

Relational databases are used to store data securely for almost all web applications. The JDBC API is used to connect to any relational database from a Java application. This framework allows you to connect to any relational database.

The ORM library Hibernate is used to automatically transform data from the relational model used in databases to the object model used in Java applications. It simplifies the integration code with the relational database to such a level that a few lines of code are sufficient for a new database query.

When building applications with a user framework (web applications, desktop applications), the MVC design pattern is used to separate the business logic of the application from the UI. This design pattern allows the UI and business logic for applications to be developed separately from each other. This is very important because in most cases, different developers with different skills are responsible for developing these parts of the applications.

Modern web services built on the constraints of the REST framework allow the creation of easy-to-understand and high-quality APIs. The REST-based API allows a web application to develop UIs based on modern libraries such as React and Angular, and to integrate applications with each other.