Do you know Project Lombok?

#lombok #java

I've been using and appreciating Lombok for some time. It's one of the first dependencies I drop into my Java projects. This article is just about making you curious writing less, more clean code and of course save some time.

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What kind of problem solves Project Lombok? ðŸ‘€

Well I think this quote is nailing it.

"Boilerplate" is a term used to describe code that is repeated in many parts of an application with little alteration. One of the most frequently voiced criticisms of the Java language is the volume of this type of code that is found in most projects. This problem is frequently a result of design decisions in various libraries, but is exacerbated by limitations in the language itself. Project Lombok aims to reduce the prevalence of some of the worst offenders by replacing them with a simple set of annotations.

Michael Kimberlin

Show me some code! ðŸ™

package com.codebud7.example;

import lombok.Builder;
import lombok.Getter;
import lombok.ToString;
import lombok.extern.java.Log;

@Log // or: @Slf4j @CommonsLog @Log4j @Log4j2 @XSlf4j
public class LombokDemoApplication
{
    public static void main(String[] args)
    {
        Article article = Article.builder()
            .title("Project Lombok")
            .published(false)
            .description("It's magic!")
            .build();

        log.info(article.toString());
    }
}

@Getter
@Builder // or: @Setter
@ToString
class Article
{
    private String title;
    private Boolean published;
    private String description;
}

This is just a small example of some powerful Lombok features.

On top of the LombokDemoApplication class you can see the @Log annotation. Instead of declaring an instance of a logger framework of your choice Project Lombok is doing this for you to save common declarations.

Let's have a look at the Article class. Use @Getter and you never will write
public int getFoo() {return foo;} again. The @Builder annotation produces complex builder APIs for your classes and @ToString is printing your class name, along with each field, in order, separated by commas by default.