A Java JIT Compiler and Runtime in Common Lisp: OpenLDK

OpenLDK is a Just-In-Time (JIT) compiler and runtime environment for Java, implemented entirely in Common Lisp. It bridges the gap between Java and Common Lisp by incrementally translating Java bytecode into Lisp, then compiling it into native machine code. This unique approach allows seamless mapping of Java classes to Common Lisp Object System (CLOS) classes, enabling effortless integration between Java and Common Lisp codebases. While not designed for high performance, OpenLDK offers a practical solution for integrating Java libraries into a Lisp workflow. Currently, it primarily supports Linux and SBCL, and is a work in progress with many features yet to be implemented, such as support for class files beyond Java 8 and bytecode verification.