Skip to main content

Project Lombok is New Feature or plugin

Project Lombok is a Java library tool that generates code for minimizing boilerplate code. The library replaces boilerplate code with easy-to-use annotations.

For example, by adding a couple of annotations, you can get rid of code clutters, such as getters and setters methods, constructors, hashcode, equals, and toString methods, and so on.

We have written a lot of boilerplate code such as getter, setter, equals, hashCode methods etc. in Java for years. In some cases, this causes problems in subjects like clean and readable code.

For such situations, Project Lombok saves our eyes  . Also, you will be able to spend more time on the business logic using Lombok.

“Never write another getter or equals method again, with one annotation your class has a fully featured builder, Automate your logging variables, and much more.”

Project Lombok uses annotations to avoid boilerplate code. In the best cases, only five lines can replace hundreds of lines of code.


@Data
@AllArgsConstructor
@NoArgsConstructor
@Entity
@Table
public class Book {
@Id
@GeneratedValue
private Long id;
private String writer;
private String name;
private String genre;
private String year;
}

Descriptions of used annotations according to JavaDoc:

  • @Data : “Generates getters for all fields, a useful toString method, and hashCode and equals implementations that check * all non-transient fields. Will also generate setters for all non-final fields, as well as a constructor.”
  • @AllArgsConstructor : “Generates a all-args constructor.”
  • @NoArgsConstructor : “Generates a no-args constructor.”
  • @Slf4j : “Causes lombok to generate a logger field.”



Comments

Popular posts from this blog

What is Amazon Web Services (AWS)?

 Amazon Web Services Amazon Web Services is a cloud computing platform provided by Amazon. The AWS offers all three service models such as Software as a Service (SaaS), Infrastructure as a Service (IAAS), and Platform as a Service (PaaS). There are more services which comprise the Amazon Web Services including Amazon Elastic Compute Cloud (EC2) which provides virtual servers, Amazon Simple Storage Service (S3) which provides scalable storage for backups, analytics. Then there are other services such as Amazon relational database management system, DynamoDB, AWS Migration hub, and more. AWS provides services in almost every category from mobile development to data analytics. Benefits of using Amazon Web Services: AWS gives access to organizations to use programming models , database and operating system. It provides a cost effective service in which you only have to pay for what you use. Applications can be deployed in multiple regions with just a few clicks. ...

Which is best, Java or Python in 2020?

Depends what you want to do. You  can  use either language for almost anything, but they definitely have different strengths and weaknesses that can help you decide which one is better for what you are doing. Python is good for: Numeric computing and AI All kinds of science and academic stuff (including natural language processing) Rapid prototyping Website backends Learning and teaching programming concepts all kinds of workflow scripting and other small programs for getting simple jobs done. interfacing with C libraries. Java is good for: Creating and distributing applications (on mobile and desktop) high-performance network backends. creating robust, reliable software at a large scale, especially in teams. implementing more foundational software systems like databases (though you might find C++ a better match for that) As a starting point to learning the JVM and leveraging it for a number of other interesting languages it hosts like Kotlin, Scala, Cloju...

What is Java Unit testing, and how do I learn it...

What is Java Unit testing, and how do I learn it... Java Unit testing is when you create small tests to verify that small bits of your code are working as “units.” Typically you write these tests in Java itself. In each test, you might get the system into a certain state, then you interact with the system to exercise the behavior you want to test. You finally verify whether or not the system did what you expected. A primary goal is to reduce the number of defects that you integrate into the rest of the source base. You’ll find numerous tutorial articles if you search. Most people use JUnit, a simple tool that you’ll find in Eclipse or IDEA.