# Join Java

> programming language

**Wikidata**: [Q6268991](https://www.wikidata.org/wiki/Q6268991)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Join_Java)  
**Source**: https://4ort.xyz/entity/join-java

## Summary
Join Java is a programming language developed by Stewart Von Itzstein in 2000. It is designed as an implementation of the join-calculus and is heavily influenced by the Java programming language. The language supports multiple paradigms, including procedural programming, reflective programming, and concurrent computing.

## Key Facts
- **Developer:** Stewart Von Itzstein
- **Inception:** 2000
- **Instance of:** Programming language
- **Influenced by:** Java (object-oriented programming language, inception 1995)
- **Manifestation of:** Join-calculus
- **Programming Paradigms:** Procedural programming, reflective programming, concurrent computing
- **Official Website:** http://joinjava.unisa.edu.au/
- **Freebase ID:** /m/06xcy4
- **Microsoft Academic ID:** 2777426752 (discontinued)

## FAQs
### Q: Who created Join Java?
A: Join Java was developed by Stewart Von Itzstein. It was first introduced in the year 2000.

### Q: What programming language influenced Join Java?
A: Join Java was influenced by Java, the object-oriented programming language originally released in 1995.

### Q: What is the theoretical basis for Join Java?
A: Join Java is a manifestation of the join-calculus, a process calculus developed for the study of concurrent computing.

### Q: What programming paradigms does Join Java support?
A: Join Java supports procedural programming, reflective programming, and concurrent computing paradigms.

## Why It Matters
Join Java serves as a specific implementation of the join-calculus within a syntax familiar to Java developers. Its primary significance lies in its approach to **concurrent computing**. By integrating the join-calculus—a mathematical model for describing concurrent systems—into a language influenced by Java, Join Java attempts to solve complexities associated with synchronization and concurrency in programming.

While standard Java utilizes threads and monitors for concurrency, Join Java leverages the join-calculus pattern, which allows developers to define how concurrent processes synchronize and exchange data through "join patterns." This makes it a notable subject of study in the field of programming language design, particularly regarding how declarative concurrency models can be integrated into procedural or object-oriented frameworks. Its development by Stewart Von Itzstein at the University of South Australia (indicated by the .edu.au domain) highlights its role in academic research into language design and distributed systems.

## Notable For
- **Manifestation of Join-Calculus:** It is one of the few languages explicitly listed as a direct manifestation of the join-calculus.
- **Concurrency Focus:** It distinguishes itself from standard Java by prioritizing concurrent computing capabilities through join-patterns.
- **Multi-Paradigm Support:** Unlike pure object-oriented languages, it explicitly supports procedural and reflective programming alongside concurrency.
- **Academic Origin:** It is an academic research language, evidenced by its university-hosted domain and specific developer attribution.

## Body
### Development and History
Join Java was created in **2000** by **Stewart Von Itzstein**. It is classified as a programming language and holds the Freebase ID `/m/06xcy4`. The project is hosted online at `http://joinjava.unisa.edu.au/`. It is distinct from, though related to, the mainstream Java language which was inceptioned in 1995.

### Design and Technical Specifications
The language is fundamentally a **manifestation of the join-calculus**, a formalism for mobile distributed systems. Unlike languages that treat concurrency as an add-on library, Join Java integrates it as a core paradigm.

**Programming Paradigms:**
Join Java supports three specific paradigms as defined in its structure:
*   **Procedural Programming:** It allows for standard procedural code execution.
*   **Reflective Programming:** It possesses the ability to inspect and modify its own structure and behavior.
*   **Concurrent Computing:** It provides built-in mechanisms for managing multiple computations simultaneously.

### Relationship to Java
While Join Java is a distinct language, it is explicitly defined as being **influenced by Java**. This suggests it shares syntactic similarities or concepts with the object-oriented language but diverges in its execution model regarding concurrency (via join-calculus) and its specific paradigm support (procedural/reflective).