Need to:
pkg install ecj dx
ecj <filename.java>
dx --dex --output=<filename.dex> <filename.class>
dalvikvm -cp <filename.dex> <filename>
For example:
ecj HelloWord.java
dx --dex --output=HelloWorld.dex HelloWorld.class
dalvikvm -cp HelloWorld.dex HelloWorld
To make an alias to run all these steps: https://gist.github.com/simonesestito/89bb66e6e08b8662a40fc42b822090e6
We can make an alias manually, and chmod +x that .java.sh