How do input stream and output stream of the same socket see eachother?

Hello i am studying an example of a server-client application and I do not understand how the client receives the string from the server. The server runs a thread that does this: String seq = generateSequence(l); //random stuff outSocket.println(seq); in the client class there is this code: String serverSeq = inSocket.readLine(); System.out.println(serverSeq); and inSocket and…

Details

Head First Design Patterns question on Duck Simulator walk through in chapter 1

I am having trouble reconciling a walk through example in intro to design patterns chapter. I copied several images of the chapter’s assertion, solution, and apparent contradictions. Problem: Joe was berated for having rubber ducks flying around on his simulator. He eventually proposes “How about an interface?” There, the MallordDuck (and others) are declared as…

Details

Required Foo but readValue was inferred to T: no instance(s) of type variables(s) exists so that capture of ? extends Foo conforms to Bar

I am trying to create a generic method that creates objects based on the type of class given or inferred by Jackson JSON API’s readValue(). public class Example <Bar extends Foo>{ Bar createOjbect(Bar bar, String JSON){ try{ ObjectMapper objectMapper = new ObjectMapper(); return objectMapper.readValue(JSON, Bar.Class); } catch(Exception e){ throw new Error(e); } } Java wants…

Details