What is netrexx?

NetRexx is a programming language that combines the simplicity of the Rexx scripting language with the power of Java. It lets you write code that looks like classic Rexx but runs on the Java Virtual Machine (JVM), giving you access to all Java libraries and features.

Let's break it down

  • Rexx roots: NetRexx keeps the easy‑to‑read syntax of Rexx (English‑like commands, minimal punctuation).
  • Java core: Under the hood, NetRexx code is compiled into Java bytecode, so it can use any Java class or framework.
  • Cross‑platform: Because it runs on the JVM, the same NetRexx program works on Windows, macOS, Linux, etc.
  • Compilation: You write a .nrx file, run the NetRexx compiler, and get a .class file that the JVM can execute.

Why does it matter?

NetRexx gives beginners a gentle entry point to Java’s ecosystem without the heavy syntax of Java itself. It’s useful for rapid prototyping, scripting tasks, or teaching programming concepts while still being able to tap into Java’s vast libraries and tools.

Where is it used?

  • Small business automation scripts that need Java libraries (e.g., reading Excel files).
  • Educational settings to teach programming fundamentals before moving to full Java.
  • Legacy systems that were originally written in Rexx and later migrated to the JVM.
  • Quick utilities or command‑line tools where developers prefer a concise syntax.

Good things about it

  • Very readable syntax, easy for beginners.
  • Full access to Java’s standard library and third‑party packages.
  • Runs anywhere the JVM runs, ensuring platform independence.
  • Can interoperate with existing Java code, allowing gradual migration.
  • Open‑source and free to use.

Not-so-good things

  • Smaller community compared to mainstream languages, so fewer tutorials and libraries specific to NetRexx.
  • Limited IDE support; most editors treat it as plain text, requiring manual configuration.
  • Performance is similar to Java, but the extra compilation step can add complexity for very simple scripts.
  • Not as widely adopted in industry, which may affect job market relevance.