package tcpclientdemo;
import java.net.*;
import java.io.*;
public class TcpClient {
    public static void main(String[] args) {
        Socket cli=null;
        InputStream is = null;
        OutputStream os = null;
        BufferedReader br = null;
        BufferedWriter bw = null;

        try {
            cli=new Socket("127.0.0.1",9999);
            is=cli.getInputStream();
            os=cli.getOutputStream();
            br=new BufferedReader(
               new InputStreamReader(is));
            bw=new BufferedWriter(
               new OutputStreamWriter(os));
            bw.write("i am tester!");
            bw.newLine();
            bw.flush();
            String str=br.readLine();
            System.out.println("client:"+str);
        } catch (Exception ex) {
            System.out.println("ex in client :"+
                    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 {
                cli.close();
            } catch (Exception e) {}

        }

    }
}