Nashorn

sudo apt install openjdk-8-jdk
update-alternatives --query jjs
sudo update-alternatives --config jjs
jjs -v

NRIC By Age

mkdir -p ~/Documents/nashorn-playground cd ~/Documents/nashorn-playground
cat <<'EOF' >> ~/Documents/nashorn-playground/printNricOf18YearsMan.js function printNricOf18YearsMan(message) { var AGE_18 = 18, todayDate = moment(), NRIC_FORMAT = 'YYMMDD-[01]-[0001]', dobOf18YearsOld = todayDate.subtract(AGE_18, 'years'), nricOf18YearsOld = dobOf18YearsOld.format(NRIC_FORMAT), aDayEarly18Years = dobOf18YearsOld.subtract(1, 'days'), nricOfDayEarly18 = aDayEarly18Years.format(NRIC_FORMAT); message = 'NRIC of' + '\n18 Years old: ' + nricOf18YearsOld + '\n17 Years old: ' + nricOfDayEarly18; print(message); } EOF	cat <<'EOF' >> ~/Documents/nashorn-playground/printNricOf56YearsMan.js function printNricOf56YearsMan(message) { var AGE_56 = 56, todayDate = moment(), NRIC_FORMAT = 'YYMMDD-[01]-[0001]', dobOf56YearsOld = todayDate.subtract(AGE_56, 'years'), nricOf56YearsOld = dobOf56YearsOld.format(NRIC_FORMAT), aDayEarly56Years = dobOf56YearsOld.subtract(1, 'days'), nricOfDayEarly56 = aDayEarly56Years.format(NRIC_FORMAT); message = 'NRIC of' + '\n56 Years old: ' + nricOf56YearsOld + '\n55 Years old: ' + nricOfDayEarly56; print(message); } EOF
jjs -v load('https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.4/moment.min.js');
load('./printNricOf18YearsMan.js'); printNricOf18YearsMan();	load('./printNricOf56YearsMan.js'); printNricOf56YearsMan();

References

Nashorn
How to build Proprietary JavaScript Library JavaScript Proprietary Library Example JavaScript Ali Express Discounted Cart JSON Schema Validation DrawIO Desktop Maven Rhino ExtJS J2V8 Ant Ivy