Syed Sayem blog

Immutables Library Examples

Some examples demonstrating how to use the Immutables Library to create immutable classes in Java.

import org.immutables.value.Value;

import java.util.List;
import java.util.Optional;

public interface Book {
String title();

Optional<String> excerpt();

Float price();

List<String> tags();

import org.immutables.value.Value;

import java.util.List;

public interface Library {
String name();

List<Book> books();

boolean opened();
public class AppTest {

public static void main(final String[] args) {
Book book1 = ImmutableBook.builder()
.title("One first book")
.excerpt("Lorem ipsum dolor sit.")
.addTags("foo", "bar", "baz")

Book book2 = ImmutableBook.builder()
.title("Another book")
.addTags("xoxo", "trololol")

Library library = ImmutableLibrary.builder()
.name("My first library")
.addBooks(book1, book2)


You may need to configure annotation processing in your IDE. You can follow this link to configure annotation processing in IntelliJ

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