What is the exact nuance of dude or man?

I'm studying English from Japan. I want to know how people feel about dude or man. Is it just a friendly way to call close friends? Like addressing a boyfriend or girlfriend as honey? Or does it include disrespectful meaning?

In Japanese people don't use you if they're not close friends. Usually they call by name or just don't say you because people know talking to you. But many people call close friends anta, omae, that is meaning 'you' a lot. But anata is little disrespectful and omae is a really disrespectful word. Maybe it's like strong "You!" or "HEY YOU!" in English.

But using like dude or man a lot. But in English, dude and man aren't disrespectful words? People don't feel annoyed if friends use the words?

Thank you. I'm sorry if my English is not good.