Project Lombok aims to reduce boilerplate code in Java by using annotations to generate getter/setter methods, toString(), equals() and hashCode() implementations. It works by processing the annotations at compile time to eliminate the need for developers to manually write these common methods. Lombok also includes a delombok tool to convert annotated code into plain Java that can be used by developers not using Lombok.

1. Project Lombok
Spice up your Java

2. Topics for Today
Why to use Lombok?
Features
Why not to use Lombok?

3. Boilerplate-
The biggest trouble in Java

4. The Project Lombok
The project Lombok aims to identify the
boilerplate codes (or patterns) in Java and
replace them with simple annotations.

5. Designing a POJO

6. The POJO Class

7. The POJO Class

8. What if I need a different Impl?

9. Fail Fast Null Check

10. Fail Fast Null Check

11. ToString

12. ToString

13. Equals and HashCode

14. Equals and HashCode

15. All in One
Getters
Setters
ToString
Equals
Hashcode
Constructor witht Fields

16. De-Lombok
A utility to convert lombok code from run-time to
compile time, so you can share the code with
those who don't like lombok.

17. <target name="delombok">
<taskdef
classname="lombok.delombok.ant.DelombokTask"
classpath="WebRoot/WEB-INF/lib/lombok.jar"
name="delombok" />
<mkdir dir="src-delomboked" />
<delombok verbose="true" encoding="UTF-8" to="src-
delomboked"
from="src" />
</target>
De-Lombok
java -jar lombok.jar delombok src -d src-delomboked
Java Command Line
Ant Task

18. ●
Most of this can be achieved by using a simple
IDE e.g. Eclipse
●
Lombok is unable to identify the constructors
of the super class
Limitations and Criticism

19. References
● https://projectlombok.org
● http://jnb.ociweb.com/jnb/jnbJan2010.html