Can you please explain this conversation, I know it's about java but what exactly is Mary saying?

Joe and John were having lunch in the school cafeteria when Joe noticed his friend Mary, the attractive Computer Science student. She was on the phone, but motioned for them to sit at her table.

No, you cant see it, its encapsulated. The valueOf methods for Wrapper classes are class level methods Thats right, you use the wrapper class name with the valueOf method because its static. Thats right, you can use valueOf with any wrapper class. Snap! You got it, Dude. Its polymorphic!

When she finished, Joe introduced Mary to John. Later Joe asked John So, what do you think of my friend Mary?

Shes nice, but I didnt understand a word she said on the phone.

Maybe she knows somebody who collects old cigar wrappers.

Maybe. What's the value of a cigar wrapper, anyway?

Google it, Dude.