Say Goodbye to Boilerplate: A Guide to Project Lombok

🚀 Monkey-Proof Challenge

Time to clean up some code! Take the following two classes and refactor them to be completely boilerplate-free using Lombok annotations.

1. The DTO Class:

// Refactor this class using Lombok
public class PostDto {
    private Long id;
    private String title;
    private String content;

    // A lot of boilerplate code goes here...
}

2. The JPA Entity Class (Remember the pro tip!):

import jakarta.persistence.Entity;
import jakarta.persistence.Id;

// Refactor this class using Lombok, but be careful!
@Entity
public class Comment {
    @Id
    private Long id;
    private String author;
    private String text;

    // A lot of boilerplate code goes here...
}

👏 Congratulations! You’ve added a powerful tool to your toolbox. By letting Lombok handle the tedious work, you can focus on writing code that matters, keeping your projects cleaner, more readable, and truly monkey-proof.

✨ Core Feature Examples: The Magic Annotations

While @Data is a great all-in-one tool, Lombok provides more specific annotations for fine-grained control.

import lombok.*;

@Getter // Generates all getter methods
@Setter // Generates all setter methods
@NoArgsConstructor // Generates a no-argument constructor
@AllArgsConstructor // Generates a constructor with all arguments
@ToString // Generates a toString() method
@EqualsAndHashCode // Generates equals() and hashCode() methods
public class Banana {
    private String type;
    private double length;
    private boolean isRipe;
}

The Fluent Builder: `@Builder`

The @Builder annotation is fantastic for creating complex objects in a readable, fluent way.

@Builder
@Getter
public class BananaOrder {
    private final String customerName;
    private final String address;
    private final int quantity;
}

// Creating an object with the builder
BananaOrder order = BananaOrder.builder()
    .customerName("Jungle Joe")
    .address("123 Treehouse Lane")
    .quantity(100)
    .build();

Effortless Logging: `@Slf4j`

Tired of writing private static final Logger log = LoggerFactory.getLogger(MyClass.class);? Lombok has you covered.

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

@Service
@Slf4j // Creates a 'log' variable for you!
public class BananaService {
    public void peelBanana() {
        log.info("A banana is being peeled.");
        // No need to declare the 'log' field yourself!
    }
}

💡 Pro Tips: The JPA Entity Trap

Warning: Be very careful when using @Data or @EqualsAndHashCode on JPA entities!

These annotations generate equals() and hashCode() methods that use all fields. This can cause serious problems with lazy-loaded collections and database identity. A lazily-loaded relationship might not be fetched, leading to incorrect equals() results. Two entities that represent the same database row might be considered unequal if their fields differ.

Best Practice: For JPA entities, avoid @Data. Instead, use more specific annotations like @Getter, @Setter, and @ToString. If you need equals() and hashCode(), it’s often best to write them yourself using only the unique primary key of the entity.

🚀 Monkey-Proof Challenge

Time to clean up some code! Take the following two classes and refactor them to be completely boilerplate-free using Lombok annotations.

1. The DTO Class:

// Refactor this class using Lombok
public class PostDto {
    private Long id;
    private String title;
    private String content;

    // A lot of boilerplate code goes here...
}

2. The JPA Entity Class (Remember the pro tip!):

import jakarta.persistence.Entity;
import jakarta.persistence.Id;

// Refactor this class using Lombok, but be careful!
@Entity
public class Comment {
    @Id
    private Long id;
    private String author;
    private String text;

    // A lot of boilerplate code goes here...
}

“Writing getters, setters, and constructors is like a monkey peeling bananas one by one. Lombok is a magic machine that peels them all for you instantly with a single command! 🍌🤖”

Let’s be honest. How many times have you written a simple Java class and then spent the next five minutes mindlessly generating getters, setters, toString(), equals(), and hashCode()? It’s a rite of passage, but it’s also a tedious, repetitive task that clutters your code with boilerplate. Your beautiful, simple class becomes a sprawling monster of auto-generated methods.

Enter Project Lombok. It’s not magic, but it’s close. Lombok is a library that plugs into your build process and IDE to auto-generate all that boilerplate code at compile time, keeping your source code clean, concise, and focused on what truly matters. It’s time to let the machine peel the bananas for you.

🤔 Why Use It? The Joy of a Clean Class

The problem Lombok solves is best shown with an example. Here is a simple MonkeyDTO class without Lombok.

// Before Lombok: The boilerplate jungle
public class MonkeyDTO {
    private String name;
    private int bananasEaten;

    public MonkeyDTO(String name, int bananasEaten) {
        this.name = name;
        this.bananasEaten = bananasEaten;
    }

    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public int getBananasEaten() { return bananasEaten; }
    public void setBananasEaten(int bananasEaten) { this.bananasEaten = bananasEaten; }

    @Override
    public boolean equals(Object o) { ... } // Auto-generated
    @Override
    public int hashCode() { ... } // Auto-generated
    @Override
    public String toString() { ... } // Auto-generated
}

Now, here’s the exact same class with Lombok. This is all you have to write:

// After Lombok: Clean and simple
import lombok.Data;

@Data // This one annotation does it all!
public class MonkeyDTO {
    private String name;
    private int bananasEaten;
}

The @Data annotation automatically generates getters, setters, a required-args constructor, toString(), equals(), and hashCode(). Your code becomes dramatically more readable and maintainable.

🛠️ Getting Started: Installation

Using Lombok requires two simple steps: adding the dependency to your build tool and ensuring your IDE can understand it.

1. Add the Dependency

Maven (pom.xml)

<dependencies>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
</dependencies>

Gradle (build.gradle)

dependencies {
    compileOnly 'org.projectlombok:lombok'
    annotationProcessor 'org.projectlombok:lombok'
}

2. Configure Your IDE

This is a critical step. Lombok works by “tricking” the compiler, and you need to let your IDE in on the secret. Otherwise, it will show errors for missing methods.

IntelliJ IDEA: Go to File -> Settings -> Plugins, search for “Lombok” and install it. Then, go to Settings -> Build, Execution, Deployment -> Compiler -> Annotation Processors and ensure “Enable annotation processing” is checked.
Eclipse: Installation is typically handled by running the Lombok jar file or through the marketplace.

✨ Core Feature Examples: The Magic Annotations

While @Data is a great all-in-one tool, Lombok provides more specific annotations for fine-grained control.

import lombok.*;

@Getter // Generates all getter methods
@Setter // Generates all setter methods
@NoArgsConstructor // Generates a no-argument constructor
@AllArgsConstructor // Generates a constructor with all arguments
@ToString // Generates a toString() method
@EqualsAndHashCode // Generates equals() and hashCode() methods
public class Banana {
    private String type;
    private double length;
    private boolean isRipe;
}

The Fluent Builder: `@Builder`

The @Builder annotation is fantastic for creating complex objects in a readable, fluent way.

@Builder
@Getter
public class BananaOrder {
    private final String customerName;
    private final String address;
    private final int quantity;
}

// Creating an object with the builder
BananaOrder order = BananaOrder.builder()
    .customerName("Jungle Joe")
    .address("123 Treehouse Lane")
    .quantity(100)
    .build();

Effortless Logging: `@Slf4j`

Tired of writing private static final Logger log = LoggerFactory.getLogger(MyClass.class);? Lombok has you covered.

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

@Service
@Slf4j // Creates a 'log' variable for you!
public class BananaService {
    public void peelBanana() {
        log.info("A banana is being peeled.");
        // No need to declare the 'log' field yourself!
    }
}

💡 Pro Tips: The JPA Entity Trap

Warning: Be very careful when using @Data or @EqualsAndHashCode on JPA entities!

Best Practice: For JPA entities, avoid @Data. Instead, use more specific annotations like @Getter, @Setter, and @ToString. If you need equals() and hashCode(), it’s often best to write them yourself using only the unique primary key of the entity.

🚀 Monkey-Proof Challenge

Time to clean up some code! Take the following two classes and refactor them to be completely boilerplate-free using Lombok annotations.

1. The DTO Class:

// Refactor this class using Lombok
public class PostDto {
    private Long id;
    private String title;
    private String content;

    // A lot of boilerplate code goes here...
}

2. The JPA Entity Class (Remember the pro tip!):

import jakarta.persistence.Entity;
import jakarta.persistence.Id;

// Refactor this class using Lombok, but be careful!
@Entity
public class Comment {
    @Id
    private Long id;
    private String author;
    private String text;

    // A lot of boilerplate code goes here...
}

✨ Core Feature Examples: The Magic Annotations

While @Data is a great all-in-one tool, Lombok provides more specific annotations for fine-grained control.

import lombok.*;

@Getter // Generates all getter methods
@Setter // Generates all setter methods
@NoArgsConstructor // Generates a no-argument constructor
@AllArgsConstructor // Generates a constructor with all arguments
@ToString // Generates a toString() method
@EqualsAndHashCode // Generates equals() and hashCode() methods
public class Banana {
    private String type;
    private double length;
    private boolean isRipe;
}

The Fluent Builder: `@Builder`

The @Builder annotation is fantastic for creating complex objects in a readable, fluent way.

@Builder
@Getter
public class BananaOrder {
    private final String customerName;
    private final String address;
    private final int quantity;
}

// Creating an object with the builder
BananaOrder order = BananaOrder.builder()
    .customerName("Jungle Joe")
    .address("123 Treehouse Lane")
    .quantity(100)
    .build();

Effortless Logging: `@Slf4j`

Tired of writing private static final Logger log = LoggerFactory.getLogger(MyClass.class);? Lombok has you covered.

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

@Service
@Slf4j // Creates a 'log' variable for you!
public class BananaService {
    public void peelBanana() {
        log.info("A banana is being peeled.");
        // No need to declare the 'log' field yourself!
    }
}

💡 Pro Tips: The JPA Entity Trap

Warning: Be very careful when using @Data or @EqualsAndHashCode on JPA entities!

Best Practice: For JPA entities, avoid @Data. Instead, use more specific annotations like @Getter, @Setter, and @ToString. If you need equals() and hashCode(), it’s often best to write them yourself using only the unique primary key of the entity.

🚀 Monkey-Proof Challenge

Time to clean up some code! Take the following two classes and refactor them to be completely boilerplate-free using Lombok annotations.

1. The DTO Class:

// Refactor this class using Lombok
public class PostDto {
    private Long id;
    private String title;
    private String content;

    // A lot of boilerplate code goes here...
}

2. The JPA Entity Class (Remember the pro tip!):

import jakarta.persistence.Entity;
import jakarta.persistence.Id;

// Refactor this class using Lombok, but be careful!
@Entity
public class Comment {
    @Id
    private Long id;
    private String author;
    private String text;

    // A lot of boilerplate code goes here...
}

“Writing getters, setters, and constructors is like a monkey peeling bananas one by one. Lombok is a magic machine that peels them all for you instantly with a single command! 🍌🤖”

🤔 Why Use It? The Joy of a Clean Class

The problem Lombok solves is best shown with an example. Here is a simple MonkeyDTO class without Lombok.

// Before Lombok: The boilerplate jungle
public class MonkeyDTO {
    private String name;
    private int bananasEaten;

    public MonkeyDTO(String name, int bananasEaten) {
        this.name = name;
        this.bananasEaten = bananasEaten;
    }

    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public int getBananasEaten() { return bananasEaten; }
    public void setBananasEaten(int bananasEaten) { this.bananasEaten = bananasEaten; }

    @Override
    public boolean equals(Object o) { ... } // Auto-generated
    @Override
    public int hashCode() { ... } // Auto-generated
    @Override
    public String toString() { ... } // Auto-generated
}

Now, here’s the exact same class with Lombok. This is all you have to write:

// After Lombok: Clean and simple
import lombok.Data;

@Data // This one annotation does it all!
public class MonkeyDTO {
    private String name;
    private int bananasEaten;
}

🛠️ Getting Started: Installation

Using Lombok requires two simple steps: adding the dependency to your build tool and ensuring your IDE can understand it.

1. Add the Dependency

Maven (pom.xml)

<dependencies>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
</dependencies>

Gradle (build.gradle)

dependencies {
    compileOnly 'org.projectlombok:lombok'
    annotationProcessor 'org.projectlombok:lombok'
}

2. Configure Your IDE

This is a critical step. Lombok works by “tricking” the compiler, and you need to let your IDE in on the secret. Otherwise, it will show errors for missing methods.

IntelliJ IDEA: Go to File -> Settings -> Plugins, search for “Lombok” and install it. Then, go to Settings -> Build, Execution, Deployment -> Compiler -> Annotation Processors and ensure “Enable annotation processing” is checked.
Eclipse: Installation is typically handled by running the Lombok jar file or through the marketplace.

✨ Core Feature Examples: The Magic Annotations

While @Data is a great all-in-one tool, Lombok provides more specific annotations for fine-grained control.

import lombok.*;

@Getter // Generates all getter methods
@Setter // Generates all setter methods
@NoArgsConstructor // Generates a no-argument constructor
@AllArgsConstructor // Generates a constructor with all arguments
@ToString // Generates a toString() method
@EqualsAndHashCode // Generates equals() and hashCode() methods
public class Banana {
    private String type;
    private double length;
    private boolean isRipe;
}

The Fluent Builder: `@Builder`

The @Builder annotation is fantastic for creating complex objects in a readable, fluent way.

@Builder
@Getter
public class BananaOrder {
    private final String customerName;
    private final String address;
    private final int quantity;
}

// Creating an object with the builder
BananaOrder order = BananaOrder.builder()
    .customerName("Jungle Joe")
    .address("123 Treehouse Lane")
    .quantity(100)
    .build();

Effortless Logging: `@Slf4j`

Tired of writing private static final Logger log = LoggerFactory.getLogger(MyClass.class);? Lombok has you covered.

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

@Service
@Slf4j // Creates a 'log' variable for you!
public class BananaService {
    public void peelBanana() {
        log.info("A banana is being peeled.");
        // No need to declare the 'log' field yourself!
    }
}

💡 Pro Tips: The JPA Entity Trap

Warning: Be very careful when using @Data or @EqualsAndHashCode on JPA entities!

Best Practice: For JPA entities, avoid @Data. Instead, use more specific annotations like @Getter, @Setter, and @ToString. If you need equals() and hashCode(), it’s often best to write them yourself using only the unique primary key of the entity.

🚀 Monkey-Proof Challenge

Time to clean up some code! Take the following two classes and refactor them to be completely boilerplate-free using Lombok annotations.

1. The DTO Class:

// Refactor this class using Lombok
public class PostDto {
    private Long id;
    private String title;
    private String content;

    // A lot of boilerplate code goes here...
}

2. The JPA Entity Class (Remember the pro tip!):

import jakarta.persistence.Entity;
import jakarta.persistence.Id;

// Refactor this class using Lombok, but be careful!
@Entity
public class Comment {
    @Id
    private Long id;
    private String author;
    private String text;

    // A lot of boilerplate code goes here...
}

“Writing getters, setters, and constructors is like a monkey peeling bananas one by one. Lombok is a magic machine that peels them all for you instantly with a single command! 🍌🤖”

🤔 Why Use It? The Joy of a Clean Class

The problem Lombok solves is best shown with an example. Here is a simple MonkeyDTO class without Lombok.

// Before Lombok: The boilerplate jungle
public class MonkeyDTO {
    private String name;
    private int bananasEaten;

    public MonkeyDTO(String name, int bananasEaten) {
        this.name = name;
        this.bananasEaten = bananasEaten;
    }

    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public int getBananasEaten() { return bananasEaten; }
    public void setBananasEaten(int bananasEaten) { this.bananasEaten = bananasEaten; }

    @Override
    public boolean equals(Object o) { ... } // Auto-generated
    @Override
    public int hashCode() { ... } // Auto-generated
    @Override
    public String toString() { ... } // Auto-generated
}

Now, here’s the exact same class with Lombok. This is all you have to write:

// After Lombok: Clean and simple
import lombok.Data;

@Data // This one annotation does it all!
public class MonkeyDTO {
    private String name;
    private int bananasEaten;
}

🛠️ Getting Started: Installation

Using Lombok requires two simple steps: adding the dependency to your build tool and ensuring your IDE can understand it.

1. Add the Dependency

Maven (pom.xml)

<dependencies>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
</dependencies>

Gradle (build.gradle)

dependencies {
    compileOnly 'org.projectlombok:lombok'
    annotationProcessor 'org.projectlombok:lombok'
}

2. Configure Your IDE

This is a critical step. Lombok works by “tricking” the compiler, and you need to let your IDE in on the secret. Otherwise, it will show errors for missing methods.

IntelliJ IDEA: Go to File -> Settings -> Plugins, search for “Lombok” and install it. Then, go to Settings -> Build, Execution, Deployment -> Compiler -> Annotation Processors and ensure “Enable annotation processing” is checked.
Eclipse: Installation is typically handled by running the Lombok jar file or through the marketplace.

✨ Core Feature Examples: The Magic Annotations

While @Data is a great all-in-one tool, Lombok provides more specific annotations for fine-grained control.

import lombok.*;

@Getter // Generates all getter methods
@Setter // Generates all setter methods
@NoArgsConstructor // Generates a no-argument constructor
@AllArgsConstructor // Generates a constructor with all arguments
@ToString // Generates a toString() method
@EqualsAndHashCode // Generates equals() and hashCode() methods
public class Banana {
    private String type;
    private double length;
    private boolean isRipe;
}

The Fluent Builder: `@Builder`

The @Builder annotation is fantastic for creating complex objects in a readable, fluent way.

@Builder
@Getter
public class BananaOrder {
    private final String customerName;
    private final String address;
    private final int quantity;
}

// Creating an object with the builder
BananaOrder order = BananaOrder.builder()
    .customerName("Jungle Joe")
    .address("123 Treehouse Lane")
    .quantity(100)
    .build();

Effortless Logging: `@Slf4j`

Tired of writing private static final Logger log = LoggerFactory.getLogger(MyClass.class);? Lombok has you covered.

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

@Service
@Slf4j // Creates a 'log' variable for you!
public class BananaService {
    public void peelBanana() {
        log.info("A banana is being peeled.");
        // No need to declare the 'log' field yourself!
    }
}

💡 Pro Tips: The JPA Entity Trap

Warning: Be very careful when using @Data or @EqualsAndHashCode on JPA entities!

Best Practice: For JPA entities, avoid @Data. Instead, use more specific annotations like @Getter, @Setter, and @ToString. If you need equals() and hashCode(), it’s often best to write them yourself using only the unique primary key of the entity.

🚀 Monkey-Proof Challenge

Time to clean up some code! Take the following two classes and refactor them to be completely boilerplate-free using Lombok annotations.

1. The DTO Class:

// Refactor this class using Lombok
public class PostDto {
    private Long id;
    private String title;
    private String content;

    // A lot of boilerplate code goes here...
}

2. The JPA Entity Class (Remember the pro tip!):

import jakarta.persistence.Entity;
import jakarta.persistence.Id;

// Refactor this class using Lombok, but be careful!
@Entity
public class Comment {
    @Id
    private Long id;
    private String author;
    private String text;

    // A lot of boilerplate code goes here...
}

✨ Core Feature Examples: The Magic Annotations

While @Data is a great all-in-one tool, Lombok provides more specific annotations for fine-grained control.

import lombok.*;

@Getter // Generates all getter methods
@Setter // Generates all setter methods
@NoArgsConstructor // Generates a no-argument constructor
@AllArgsConstructor // Generates a constructor with all arguments
@ToString // Generates a toString() method
@EqualsAndHashCode // Generates equals() and hashCode() methods
public class Banana {
    private String type;
    private double length;
    private boolean isRipe;
}

The Fluent Builder: `@Builder`

The @Builder annotation is fantastic for creating complex objects in a readable, fluent way.

@Builder
@Getter
public class BananaOrder {
    private final String customerName;
    private final String address;
    private final int quantity;
}

// Creating an object with the builder
BananaOrder order = BananaOrder.builder()
    .customerName("Jungle Joe")
    .address("123 Treehouse Lane")
    .quantity(100)
    .build();

Effortless Logging: `@Slf4j`

Tired of writing private static final Logger log = LoggerFactory.getLogger(MyClass.class);? Lombok has you covered.

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

@Service
@Slf4j // Creates a 'log' variable for you!
public class BananaService {
    public void peelBanana() {
        log.info("A banana is being peeled.");
        // No need to declare the 'log' field yourself!
    }
}

💡 Pro Tips: The JPA Entity Trap

Warning: Be very careful when using @Data or @EqualsAndHashCode on JPA entities!

Best Practice: For JPA entities, avoid @Data. Instead, use more specific annotations like @Getter, @Setter, and @ToString. If you need equals() and hashCode(), it’s often best to write them yourself using only the unique primary key of the entity.

🚀 Monkey-Proof Challenge

Time to clean up some code! Take the following two classes and refactor them to be completely boilerplate-free using Lombok annotations.

1. The DTO Class:

// Refactor this class using Lombok
public class PostDto {
    private Long id;
    private String title;
    private String content;

    // A lot of boilerplate code goes here...
}

2. The JPA Entity Class (Remember the pro tip!):

import jakarta.persistence.Entity;
import jakarta.persistence.Id;

// Refactor this class using Lombok, but be careful!
@Entity
public class Comment {
    @Id
    private Long id;
    private String author;
    private String text;

    // A lot of boilerplate code goes here...
}

“Writing getters, setters, and constructors is like a monkey peeling bananas one by one. Lombok is a magic machine that peels them all for you instantly with a single command! 🍌🤖”

🤔 Why Use It? The Joy of a Clean Class

The problem Lombok solves is best shown with an example. Here is a simple MonkeyDTO class without Lombok.

// Before Lombok: The boilerplate jungle
public class MonkeyDTO {
    private String name;
    private int bananasEaten;

    public MonkeyDTO(String name, int bananasEaten) {
        this.name = name;
        this.bananasEaten = bananasEaten;
    }

    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public int getBananasEaten() { return bananasEaten; }
    public void setBananasEaten(int bananasEaten) { this.bananasEaten = bananasEaten; }

    @Override
    public boolean equals(Object o) { ... } // Auto-generated
    @Override
    public int hashCode() { ... } // Auto-generated
    @Override
    public String toString() { ... } // Auto-generated
}

Now, here’s the exact same class with Lombok. This is all you have to write:

// After Lombok: Clean and simple
import lombok.Data;

@Data // This one annotation does it all!
public class MonkeyDTO {
    private String name;
    private int bananasEaten;
}

🛠️ Getting Started: Installation

Using Lombok requires two simple steps: adding the dependency to your build tool and ensuring your IDE can understand it.

1. Add the Dependency

Maven (pom.xml)

<dependencies>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
</dependencies>

Gradle (build.gradle)

dependencies {
    compileOnly 'org.projectlombok:lombok'
    annotationProcessor 'org.projectlombok:lombok'
}

2. Configure Your IDE

This is a critical step. Lombok works by “tricking” the compiler, and you need to let your IDE in on the secret. Otherwise, it will show errors for missing methods.

IntelliJ IDEA: Go to File -> Settings -> Plugins, search for “Lombok” and install it. Then, go to Settings -> Build, Execution, Deployment -> Compiler -> Annotation Processors and ensure “Enable annotation processing” is checked.
Eclipse: Installation is typically handled by running the Lombok jar file or through the marketplace.

✨ Core Feature Examples: The Magic Annotations

While @Data is a great all-in-one tool, Lombok provides more specific annotations for fine-grained control.

import lombok.*;

@Getter // Generates all getter methods
@Setter // Generates all setter methods
@NoArgsConstructor // Generates a no-argument constructor
@AllArgsConstructor // Generates a constructor with all arguments
@ToString // Generates a toString() method
@EqualsAndHashCode // Generates equals() and hashCode() methods
public class Banana {
    private String type;
    private double length;
    private boolean isRipe;
}

The Fluent Builder: `@Builder`

The @Builder annotation is fantastic for creating complex objects in a readable, fluent way.

@Builder
@Getter
public class BananaOrder {
    private final String customerName;
    private final String address;
    private final int quantity;
}

// Creating an object with the builder
BananaOrder order = BananaOrder.builder()
    .customerName("Jungle Joe")
    .address("123 Treehouse Lane")
    .quantity(100)
    .build();

Effortless Logging: `@Slf4j`

Tired of writing private static final Logger log = LoggerFactory.getLogger(MyClass.class);? Lombok has you covered.

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

@Service
@Slf4j // Creates a 'log' variable for you!
public class BananaService {
    public void peelBanana() {
        log.info("A banana is being peeled.");
        // No need to declare the 'log' field yourself!
    }
}

💡 Pro Tips: The JPA Entity Trap

Warning: Be very careful when using @Data or @EqualsAndHashCode on JPA entities!

Best Practice: For JPA entities, avoid @Data. Instead, use more specific annotations like @Getter, @Setter, and @ToString. If you need equals() and hashCode(), it’s often best to write them yourself using only the unique primary key of the entity.

🚀 Monkey-Proof Challenge

Time to clean up some code! Take the following two classes and refactor them to be completely boilerplate-free using Lombok annotations.

1. The DTO Class:

// Refactor this class using Lombok
public class PostDto {
    private Long id;
    private String title;
    private String content;

    // A lot of boilerplate code goes here...
}

2. The JPA Entity Class (Remember the pro tip!):

import jakarta.persistence.Entity;
import jakarta.persistence.Id;

// Refactor this class using Lombok, but be careful!
@Entity
public class Comment {
    @Id
    private Long id;
    private String author;
    private String text;

    // A lot of boilerplate code goes here...
}

🚀 Monkey-Proof Challenge

✨ Core Feature Examples: The Magic Annotations

The Fluent Builder: @Builder

Effortless Logging: @Slf4j

💡 Pro Tips: The JPA Entity Trap

🚀 Monkey-Proof Challenge

🤔 Why Use It? The Joy of a Clean Class

🛠️ Getting Started: Installation

1. Add the Dependency

2. Configure Your IDE

✨ Core Feature Examples: The Magic Annotations

The Fluent Builder: @Builder

Effortless Logging: @Slf4j

💡 Pro Tips: The JPA Entity Trap

🚀 Monkey-Proof Challenge

✨ Core Feature Examples: The Magic Annotations

The Fluent Builder: @Builder

Effortless Logging: @Slf4j

💡 Pro Tips: The JPA Entity Trap

🚀 Monkey-Proof Challenge

🤔 Why Use It? The Joy of a Clean Class

🛠️ Getting Started: Installation

1. Add the Dependency

2. Configure Your IDE

✨ Core Feature Examples: The Magic Annotations

The Fluent Builder: @Builder

Effortless Logging: @Slf4j

💡 Pro Tips: The JPA Entity Trap

🚀 Monkey-Proof Challenge

🤔 Why Use It? The Joy of a Clean Class

🛠️ Getting Started: Installation

1. Add the Dependency

2. Configure Your IDE

✨ Core Feature Examples: The Magic Annotations

The Fluent Builder: @Builder

Effortless Logging: @Slf4j

💡 Pro Tips: The JPA Entity Trap

🚀 Monkey-Proof Challenge

✨ Core Feature Examples: The Magic Annotations

The Fluent Builder: @Builder

Effortless Logging: @Slf4j

💡 Pro Tips: The JPA Entity Trap

🚀 Monkey-Proof Challenge

🤔 Why Use It? The Joy of a Clean Class

🛠️ Getting Started: Installation

1. Add the Dependency

2. Configure Your IDE

✨ Core Feature Examples: The Magic Annotations

The Fluent Builder: @Builder

Effortless Logging: @Slf4j

💡 Pro Tips: The JPA Entity Trap

🚀 Monkey-Proof Challenge

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The Fluent Builder: `@Builder`

Effortless Logging: `@Slf4j`

The Fluent Builder: `@Builder`

Effortless Logging: `@Slf4j`

The Fluent Builder: `@Builder`

Effortless Logging: `@Slf4j`

The Fluent Builder: `@Builder`

Effortless Logging: `@Slf4j`

The Fluent Builder: `@Builder`

Effortless Logging: `@Slf4j`

The Fluent Builder: `@Builder`

Effortless Logging: `@Slf4j`

The Fluent Builder: `@Builder`

Effortless Logging: `@Slf4j`