Brief about java.net.HttpURLConnection class This class inherits from URLConnection. The HTTP specific features are supported by this class. Each instance of HttpURLConnection is used to make a single request, but HTTP server which is under the network connection can be transparent to the shared instances. A HttpURLConnection request may be freed by using close() method on the InputStream or the OutputStream. The underlying socket can be closed by invoking disconnect() method.
Explain how to create thread in Java, What are native operating system threads?, What is a green thread?, What is a working thread?...