— Scott McNealy, Sun Microsystems Chairman, President and ceo

Socket sock = serverSock.accept();
4242
Socket
Socket
This starts the server application listening 
for client requests coming in for port 4242.
Client knows the IP address and port number 
(published or given to him by whomever 
configures the server app to be on that port)
The accept() method blocks (just sits there) while 
it’s waiting for a client Socket connection. When a 
client finally tries to connect, the method returns 
a plain old Socket (on a 
different port) that knows 
how to communicate with the client (i.e., knows the 
client’s IP address and port number). The Socket is on 
a different port than the ServerSocket, so that the 
ServerSocket can go back to waiting for other clients.
2789

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484
 
chapter 15
import java.io.*;
import java.net.*;
public class DailyAdviceServer {
String[] adviceList = {“Take smaller bites”, “Go for the tight jeans. No they do NOT 
make you look fat.”, “One word: inappropriate”, “Just for today, be honest. Tell your 
boss what you *really* think”, “You might want to rethink that haircut.”};
public void go() {
try {
ServerSocket serverSock = new ServerSocket(4242);

while(true) {
Socket sock = serverSock.accept();

PrintWriter writer = new PrintWriter(sock.getOutputStream());
String advice = getAdvice();
writer.println(advice);
writer.close();
System.out.println(advice);
}
} catch(IOException ex) {
ex.printStackTrace();
}
} // close go
private String getAdvice() {
int random = (int) (Math.random() * adviceList.length);