I am a new to Java, can someone help me and explain this?

[rapid grotto]

⌛ This post has been reserved for your question.

Hey @keen stone! Please use /close or the Close Post button above when your problem is solved. Please remember to follow the help guidelines. This post will be automatically closed after 300 minutes of inactivity.

TIP: Narrow down your issue to simple and precise questions to maximize the chance that others will reply in here.