A New Boilerplate Code Generation in Java

[nieuwmijnleven]

Select Topic Area

Show & Tell

Body

JPlus is a modern programming language and compiler that acts as a superset of Java —
bringing the benefits of null safety and powerful boilderplate code generation declarative features
while remaining fully interoperable with existing Java code and libraries.

---

✨ Why JPlus?

Java is a powerful and battle-tested language, but developers often face:

• Verbose boilerplate (getters/setters, constructors, etc.)

• Dangerous NullPointerException

• Lack of modern language features like ?: (Elvis), smart casts, or pattern matching

JPlus solves this by introducing modern features on top of Java — without breaking compatibility.

JPlus code compiles to standard Java code, enabling full use of Java libraries and frameworks.

---

🔐 Null Safety & Modern Syntax Features

JPlus enforces strict null checks at compile-time and introduces Kotlin-style operators:

Feature	Description
Type vs Type?	Explicit non-nullable and nullable types
?.	Null-safe access operator
?:	Elvis operator for default/fallback values
Named Parameter	Allows passing arguments by name
Async Syntax (planned)	Future-ready syntax with async/await support

---

🔧 NEW: apply Syntax for Replacing Lombok

JPlus introduces the new apply statement — a powerful declarative alternative to Lombok annotations.

🔁 Replace This:

@Data
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class User {
    private String name;
    private int age;
}

✅ With This:

apply data, builder, constructors(all, no);  

public class User {     
	private String name;     
	private int age; 
}

💡 Even Nested Classes:

apply data, constructor(required, all, no), builder;  
apply {  
    User.Profile: getter, setter, equality, constructor(all);
}  
  
public class User {  
    private String name;    
    private int age;  
    
    public class Profile {        
	    String nickname;    
	}
}

All boilerplate — constructors, getters/setters, toString, equals, builder — generated as plain Java.

For full code and output, see:
Go to Example 6

---

🔭 Install JPlus IntelliJ Plugin

The JPlus IntelliJ plugin has been officially released on the JetBrains Marketplace.

• Go to File > Settings > Plugins and search for "JPlus" to install it.

---

💝 Support Development

JPlus is a one-person open-source project under active development.

If you find value in this work and want to help shape the future of Java development:

👉 Github Sponsors

👉 Support the Project via PayPal

Your contribution supports language tooling, plugin development, and community outreach.
The benefits will ripple across the entire Java community.

---

💬 Get Involved

• ⭐ Star the project on GitHub

• 🐛 Report bugs and suggest features

• 🧠 Contribute code or docs

• 💬 Join the community discussions

---

🔗 Learn More

• JPlus GitHub Repository

• Making your Java code null-safe without rewriting