Why Lombok’s Magic Can Turn Your Java Code into a Debt Trap

If you are reading this, you probably already know Project Lombok and are considering adopting it for your Java projects. Lombok can dramatically reduce boilerplate with a few annotations, but remember that most source code is read far more often than it is executed.

Love’s Beginning, Hate’s Origin

Installing the Lombok plugin in IntelliJ IDEA is trivial, but the initial enthusiasm soon gives way to concerns when upgrading a project’s JDK version.

Before Lombok, a typical JavaBean looks like this:

public class MyObject {
    private Long id;
    private String name;
    private int age;
    private int gender;

    public Long getId() { return id; }
    public void setId(Long id) { this.id = id; }
    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public int getAge() { return age; }
    public void setAge(int age) { this.age = age; }
    public int getGender() { return gender; }
    public void setGender(int gender) { this.gender = gender; }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        MyObject obj = (MyObject) o;
        return age == obj.age && gender == obj.gender &&
               Objects.equals(id, obj.id) && Objects.equals(name, obj.name);
    }

    @Override
    public int hashCode() { return Objects.hash(id, name, age, gender); }

    @Override
    public String toString() {
        return "MyObject{" + "id=" + id + "name=" + name + "age=" + age + "gender=" + gender + "}";
    }
}

After adding Lombok’s @Getter and @Setter, the class becomes much slimmer:

@Getter
@Setter
public class MyObject {
    private Long id;
    private String name;
    private int age;
    private int gender;

    @Override
    public boolean equals(Object o) { /* same as before */ }
    @Override
    public int hashCode() { /* same as before */ }
    @Override
    public String toString() { /* same as before */ }
}

Further reduction is possible with @EqualsAndHashCode to replace the equals and hashCode methods:

@Getter
@Setter
@EqualsAndHashCode
public class MyObject {
    private Long id;
    private String name;
    private int age;
    private int gender;

    @Override
    public String toString() { /* same as before */ }
}

And finally, Lombok’s composite annotation @Data can eliminate all boilerplate at once:

@Data
public class MyObject {
    private Long id;
    private String name;
    private int age;
    private int gender;
}

While the code looks sleek, several serious drawbacks emerge.

1. JDK Version Issues

Upgrading from Java 8 to Java 11 broke Lombok in the author’s project, forcing a complete removal of Lombok annotations and regeneration of boilerplate code, which is time‑consuming.

2. Forced Usage

Any downstream consumer of a Lombok‑annotated library must also install the Lombok plugin and understand its annotations, otherwise the code will not compile or run correctly.

3. Poor Readability

Lombok hides the actual implementations of getters, setters, constructors, and other methods. An @AllArgsConstructor can generate a massive constructor that exposes all fields, making it hard to reason about object initialization and increasing the risk of bugs.

4. Increased Coupling

Using Lombok ties every module that depends on the annotated code to the Lombok library and its IDE plugin, creating invasive coupling and potential upgrade headaches.

5. Not Worth the Trade‑off

Although Lombok reduces boilerplate, it pollutes the codebase, harms readability, and adds technical debt. For teams that need both conciseness and safety, languages like Scala or Kotlin on the JVM may be better alternatives.

Conclusion

Lombok is a clever syntactic sugar that can make Java code appear slimmer, but it is not a standard library. Its use introduces technical debt, reduces readability, and increases coupling. Before adopting Lombok in a team or large project, weigh the short‑term convenience against long‑term maintenance costs.