Brainf*ck JVM Compiler

A compiler that compiles Brainf*ck input to Java bytecode that can be executed on a JVM, using the preview Class-File API.

The compiler is simple and does no optimizations. For an optimizing compiler see here.

Building

You'll need JDK 23, the easiest way to install this, on Linux, is with SDK man:

sdk install java 23-open

You can then compile the Main class with --release 23 and --enable-preview flags:

$ javac --release 23 --enable-preview src/BfCompiler.java -d build

Run

Compile a Brainf*ck program by passing the input file path and the output jar path to the compiler.

You can execute the compiled class, or simply run BfCompiler.java directly from source with the --source 23 parameter:

$ java --enable-preview --source 23 src/BfCompiler.java examples/hellojvm.bf build/out.jar

The compiled jar can then be executed:

$ java -jar build/out.jar