Core Java, Vol. II-Advanced Features, 12th Edition

Chapter 4. Networking

In this chapter

• 4.1 Connecting to a Server

• 4.2 Implementing Servers

• 4.3 Getting Web Data

• 4.4 The HTTP Client

• 4.5 Sending E-Mail

We begin this chapter by reviewing basic networking concepts, then move on to writing Java programs that connect to network services. We will show you how network clients and servers are implemented. Finally, you will see how to send e-mail from a Java program and how to harvest information from a web server.

4.1 Connecting to a Server

In the following sections, you will connect to a server, first by hand and with telnet, and then with a Java program.

4.1.1 Using Telnet

The telnet program is a great debugging tool for network programming. You should be able to launch it by typing telnet