Java HTTPS Proxy and Connect

My HTTPS Proxy should work like this:

• it should establish a Connection with Connect
• it should pass the traffic but should not be able to modify it.
• So it should not be able to read it.

I have read now some stuff over the CONNECT. But I do not really understand it and how to implement it.

My Question is now what exactly does CONNECT do?CONNECT is an HTTP Request. But all it does it establish a connection. but how does this help me?

I can not see how to use it to achieve my goal.

greetings

Christoph