Exception in thread "main" java.lang.UnsupportedOperationException: No class provided, and an appropriate one cannot be found.

[nihaowxh]

Hello, I got a problem when I used this packages.The error is showed as the following picture, could someone explain the reason?

Best regards,
Xinghao

[nihaowxh]

my jdk version is 1.8

[already-love]

same warnings....