package tcpserverdemo;

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

public class TcpServer {
    public static void main(String[] args) {
        ServerSocket server = null;
        Socket soc = null;
        InputStream is = null;
        OutputStream os = null;
        BufferedReader br = null;
        BufferedWriter bw = null;

        try {
            server = new ServerSocket(9999);
            System.out.println("server is listenning....");
            soc = server.accept();
            System.out.println("server has accept a client!");
            is = soc.getInputStream();
            os = soc.getOutputStream();
            br = new BufferedReader(
                    new InputStreamReader(is));
            bw = new BufferedWriter(
                    new OutputStreamWriter(os));
            String str = br.readLine();
            System.out.println("server str:" + str);
            bw.write("Welcome!");
            bw.newLine();
            bw.flush();
        } catch (Exception ex) {
            System.out.println("ex in server:"+ex.getMessage());
        }finally
        {
            try {
                bw.close();
            } catch (Exception e) {}
            try {
                br.close();
            } catch (Exception e) {}
            try {
                os.close();
            } catch (Exception e) {}
            try {
                is.close();
            } catch (Exception e) {}
            try {
                soc.close();
            } catch (Exception e) {}
            try {
                server.close();
            } catch (Exception e) {}

        }
    }
}