Install via CLI

1. ArchLinux

• Now we are going to install the latest version of JRE

   sudo pacman -S jre-openjdk

• Now we are going to install the latest version of JDK

   sudo pacman -S jdk-openjdk

2. Others

    sudo apt install openjdk-XX-jdk
    sudo apt install openjdk-XX-jre

   Install the latest available version for your distro

Create the script setup.sh.

  #!/usr/bin/sh

  setup(){
  	local venvpath="$HOME/path/to/env"

  	source "${venvpath}/bin/activate"
  	
  	export CLASSPATH=.:~/.m2/repository/org/antlr/antlr4/4.13.1/antlr4-4.13.1-complete.jar:$CLASSPATH
  	alias grun='java org.antlr.v4.gui.TestRig'
  }

  setup

Execute the script

  source setup.sh

Now we compile boths files.

  ~ antlr4 -no-listener -visitor DotExpr.g4 

With javac we compile the java codes generated.

  javac *.java

If we want to see the gui, run Antlr with grun

  grun DotExpr graph -gui