Maker VS proguard

If you want an alternative to ASM, try Cojen/Maker, which is designed to be much easier to use than any of the other class writing APIs, including the one proposed by JEP-8280389. Here's a comparison.

That's a lot right arrow operators just to implement a simple Hello World program (5). I can't even begin to imagine how difficult it might be to generate anything more interesting than this. Here's a comparison against a classfile API which is designed to be easy to use: https://github.com/cojen/Maker/wiki/JEP-8280389

For the code generation phase, it might be easier to bypass emitting a text-based assembly format and just use the ASM library directly. If you want something easier, I wrote a code generation library specifically for that purpose: https://github.com/cojen/Maker It also includes an example "Mini-C" language compiler.

https://github.com/Guardsquare/proguard (not the best but it does work)

Nice project! At Guardsquare, we have a similar project: https://github.com/Guardsquare/proguard-assembler

One of the things we use it for is testing: we can craft specific bytecode sequences that we want to test; for example, it's useful to test cases we've seen in the wild (e.g. obfuscated code) or to create a test that doesn't rely on a specific compiler/version.

An example of using the assembler from a ProGuard unit test https://github.com/Guardsquare/proguard/blob/master/base/src...

ProGuard is free and open-source; https://github.com/Guardsquare/proguard

With the upcoming release of AGP 7, ProGuard needs a new way of integrating into Android projects. Therefore, as part of the latest ProGuard 7.1 release, we developed a Gradle plugin for ProGuard. With this plugin ProGuard integrates into your existing gradle process, so that you can keep using ProGuard with AGP 7. You can find the plugin in the ProGuard GitHub repository.