phg@ubuntu:~/gateway-model$ javac -version javac 1...
# getting-started
r
phg@ubuntu:~/gateway-model$ javac -version javac 1.8.0_222 phg@ubuntu:~/gateway-model$ java -version openjdk version "1.8.0_222" OpenJDK Runtime Environment (build 1.8.0_222-8u222-b10-1ubuntu1~18.04.1-b10) OpenJDK 64-Bit Server VM (build 25.222-b10, mixed mode)