Hi @EricRogerGarcia,
In the first place why would you want to run your Processing/Java project in the browser? Is your project too big to convert it to p5.js?
The difficult part of running a Java program in a web browser is that if you use any kind of specific Java APIs or libraries then it might break or you’ll need advanced Maven/Gradle configuration.
If you are starting a new project, just use p5.js.
You might want to take a look at: