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I’m writing a toy interpreter with a REPL in Java. I’d like to generate bytecode from the language and run that, instead of interpreting an AST and running that instead.
Since my Java is a bit rusty, is it possible to run generated bytecode on the fly on the JVM?
You can use java.lang.Classloader.defineClass(), which turns bytecode into a Class object. You can the call newInstance() on the resulting Class object, and off you go.