Project Lombok for java programmer

Why Project Lombok is useful for java programmer?

 Lombok is a tool that generates code for you, but not in the way that your IDE generates it. Your IDE generates getters & setters, or equals and more, and then puts the code in your uncompiled class file. Lombok generates the same thing, but does it in the class file; all you need to do is add some annotations like @Setter, @Getter, @Builder, @Data … to your code and Lombok generates the setters, getters and so on for you. At the same time, you can override whatever is generated by just writing the method yourself instead.

Lombok features/Advantages

val

Finally! Hassle-free final local variables.

@NonNull

or: How I learned to stop worrying and love the NullPointerException.

@Cleanup

Automatic resource management: Call your close() methods safely with no hassle.

@Getter / @Setter

Never write public int getFoo() {return foo;} again.

@ToString

No need to start a debugger to see your fields: Just let lombok generate a toString for you!

@EqualsAndHashCode

Equality made easy: Generates hashCode and equals implementations from the fields of your object.

 

@NoArgsConstructor, @RequiredArgsConstructor and @AllArgsConstructor

Constructors made to order: Generates constructors that take no arguments, one argument per final / non-null field, or one argument for every field.

@Data

All together now: A shortcut for @ToString, @EqualsAndHashCode, @Getter on all fields, and @Setter on all non-final fields, and @RequiredArgsConstructor!

@Value

Immutable classes made very easy.

@Builder

... and Bob's your uncle: No-hassle fancy-pants APIs for object creation!

@SneakyThrows

To boldly throw checked exceptions where no one has thrown them before!

@Synchronized

synchronized done right: Don't expose your locks.

@Getter(lazy=true)

Laziness is a virtue!

@Log

Captain's Log, stardate 24435.7: "What was that line again?"

Configuration system

Lombok, made to order: Configure lombok features in one place for your entire project or even your workspace.

Experimental features

Here be dragons: Extra features which aren't quite ready for prime time yet.