Java APIs

hie everyone...i am quite new to java and can anyone teach me how to read the Java API Documentation...i did see the documentation but all just mention something like this:

public ServerSocket(int port) throws IOException


how do i know what to do and how do i implement into it? for an example i wanted to call a method and how do i implement the method as well? For an example the first wan in the Java API documentation says that "Socket" and then "accept()'...what is this both means?...is the "Socket" is the return type? can anyone pls teach me how to implement this thing? can anyone pls teach me how to read and apply the documentation as well?...thanks a lot...