ssclient.java

java网络聊天 基于对JAVA的了解我写了个简单的代码 不足之处请多多指教

// SSClient.java

import java.io.*;
import java.net.*; 

class SSClient
{
　public static void main (String [] args)
　{
　　String host = "localhost";

　　// If user specifies a command-line argument, that argument
　　// represents the host name.

　　if (args.length == 1)
　　　host = args [0];

　　BufferedReader br = null;
　　PrintWriter pw = null;
　　Socket s = null;

　　try
　　{
　　　// Create a socket that attempts to connect to the server
　　　// program on the host at port 10000.

　　　s = new Socket (host, 10000);

　　　// Create an input stream reader that chains to the socket's
　　　// byte-oriented input stream. The input stream reader
　　　// converts bytes read from the socket to characters. The
　　　// conversion is based on the platform's default character
　　　// set.

　　　InputStreamReader isr;
　　　isr = new InputStreamReader (s.getInputStream ());

　　　// Create a buffered reader that chains to the input stream
　　　// reader. The buffered reader supplies a convenient method
　　　// for reading entire lines of text.

　　　br = new BufferedReader (isr);

　　　// Create a print writer that chains to the socket's byte-
　　　// oriented output stream. The print writer creates an
　　　// intermediate output stream writer that converts
　　　// characters sent to the socket to bytes. The conversion
　　　// is based on the platform's default character set.

　　　pw = new PrintWriter (s.getOutputStream (), true);

　　　// Send the DATE command to the server.

　　　pw.println ("DATE");

　　　// Obtain and print the current date/time.

　　　System.out.println (br.readLine ());
　　　// Send the PAUSE command to the server. This allows several
　　　// clients to start and verifies that the server is spawning
　　　// multiple threads.

　　　pw.println ("PAUSE");
　　　// Send the DOW command to the server.

　　　pw.println ("DOW");

　　　// Obtain and print the current day of week.

　　　System.out.println (br.readLine ());

　　　// Send the DOM command to the server.
　
　　　pw.println ("DOM");

　　　// Obtain and print the current day of month.

　　　System.out.println (br.readLine ());

　　　// Send the DOY command to the server.

　　　pw.println ("DOY");

　　　// Obtain and print the current day of year.

　　　System.out.println (br.readLine ());
　　}
　　catch (IOException e)
　　{
　　　System.out.println (e.toString ());
　　}
　　finally
　　{
　　　try
　　　{
　　　　if (br != null)
　　　　　br.close ();

　　　　if (pw != null)
　　　　　pw.close ();

　　　　if (s != null)
　　　　　s.close ();
　　　}
　　　catch (IOException e)
　　　{
　　　　}
　　}
　}
}