root@195-154-78-210:~# lsb_release -a && uname -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.5 LTS
Release:	18.04
Codename:	bionic
Linux 195-154-78-210 4.15.0-118-generic #119-Ubuntu SMP Tue Sep 8 12:30:01 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
root@195-154-78-210:~# apt install openjdk-11-jre
[…]
root@195-154-78-210:~# java -jar test-passwd.jar 50
Test ok in 1736ms
Test ok in 1682ms
Test ok in 1877ms
Test ok in 1533ms
Test ok in 2738ms
Test ok in 3740ms
Test ok in 3874ms
Test ok in 3874ms
Test ok in 3868ms
Test ok in 3870ms
Test ok in 3867ms
Test ok in 3875ms
Test ok in 3873ms
Test ok in 3872ms
Test ok in 3873ms
Test ok in 3874ms
Test ok in 3873ms
Test ok in 3875ms
Test ok in 3872ms
Test ok in 3872ms
Test ok in 3866ms
Test ok in 3886ms
Test ok in 3868ms
Test ok in 3869ms
Test ok in 3873ms
Test ok in 3867ms
Test ok in 3866ms
Test ok in 3869ms
Test ok in 2528ms
Test ok in 1540ms
Test ok in 2433ms
Test ok in 3621ms
Test ok in 3855ms
Test ok in 3856ms
Test ok in 4019ms
Test ok in 3855ms
Test ok in 3855ms
Test ok in 3858ms
Test ok in 3854ms
Test ok in 3848ms
Test ok in 3878ms
Test ok in 3854ms
Test ok in 3851ms
Test ok in 3855ms
Test ok in 3855ms
Test ok in 3851ms
Test ok in 3851ms
Test ok in 3851ms
Test ok in 3856ms
Test ok in 3856ms
root@195-154-78-210:~#