FileDocCategorySizeDatePackage
Client.javaAPI DocExample2745Sat Jun 02 03:11:58 BST 2001None

Client

public class Client extends Object

Fields Summary
public static final int
DEFAULT_PORT
Constructors Summary
Methods Summary
public static voidmain(java.lang.String[] args)

        int port = DEFAULT_PORT;
        Socket s = null;
        
        // Parse the port specification
        if ((args.length != 1) && (args.length != 2)) usage();
        if (args.length == 1) port = DEFAULT_PORT;
        else {
            try { port = Integer.parseInt(args[1]); }
            catch (NumberFormatException e) { usage(); }
        }
        
        try {
            // Create a socket to communicate to the specified host and port
            s = new Socket(args[0], port);
            // Create streams for reading and writing lines of text
            // from and to this socket.
            DataInputStream sin = new DataInputStream(s.getInputStream());
            PrintStream sout = new PrintStream(s.getOutputStream());
            // Create a stream for reading lines of text from the console
            DataInputStream in = new DataInputStream(System.in);
            
            // Tell the user that we've connected
            System.out.println("Connected to " + s.getInetAddress()
                       + ":"+ s.getPort());

            String line;
            while(true) {
                // print a prompt
                System.out.print("> "); 
                System.out.flush();
                // read a line from the console; check for EOF
                line = in.readLine();
                if (line == null) break;
                // Send it to the server
                sout.println(line);
                // Read a line from the server.  
                line = sin.readLine();
                // Check if connection is closed (i.e. for EOF)
                if (line == null) { 
                    System.out.println("Connection closed by server.");
                    break;
                }
                // And write the line to the console.
                System.out.println(line);
            }
        }
        catch (IOException e) { System.err.println(e); }
        // Always be sure to close the socket
        finally {
            try { if (s != null) s.close(); } catch (IOException e2) { ; }
        }
    
public static voidusage()

        
        System.out.println("Usage: java Client <hostname> [<port>]");
        System.exit(0);