For example, as a post-compilation step you could massage the .class data to make the byte code either harder to read when decompiled or harder to decompile into valid Java code (or both).

Java famously runs on billions of devices, including workstations, desktops, tablets, supercomputers, and jewelry. Yes, jewelry. Look it up. [Michael] realized Java doesn’t run on Commodore 6… ...

Direct execution of Java byte code is possible thanks to a Java extension to the ARM processor core by ARM Ltd., Cambridge, England. Known as Jazelle, ... For example, designers writing a ...

However, if you are interested in retrocomputing, retrogaming, or you just want a better understanding of how a byte-coded interpreter works, this is a fun read with lots of code examples.

The code snippet printed byte counts (123,456,789 bytes) in a human-readable format, like 123.5 MB. Academics found that this code had been copied and embedded in more than 6,000 GitHub Java ...