package socket;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.Socket;

import java.net.UnknownHostException;

public class Client {

    public static void main(String[] args) {

        Socket s = null;

        InputStream is = null;

        BufferedReader br = null;

        try {

            s = new Socket("127.0.0.1", 6666);

            is = s.getInputStream();

            br = new BufferedReader(new InputStreamReader(is));

            String str = br.readLine();

            while(str!=null){

                System.out.println(str);

                str = br.readLine();

            }

        } catch (UnknownHostException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        }finally {

            try {

                br.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

            try {

                is.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

            try {

                s.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

    }

}

package socket;

import java.io.BufferedWriter;

import java.io.IOException;

import java.io.OutputStream;

import java.io.OutputStreamWriter;

import java.net.ServerSocket;

import java.net.Socket;

public class Server {

    public static void main(String[] args) {

        ServerSocket ss = null;

        Socket s = null;

        OutputStream os = null;

        BufferedWriter bw = null;

        try {

            ss = new ServerSocket(6666);

            s = ss.accept();

            os = s.getOutputStream();

            bw = new BufferedWriter(new OutputStreamWriter(os));

            bw.write("hello java !");

            bw.flush();

        } catch (IOException e) {

            e.printStackTrace();

        }finally{

            try {

                bw.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

            try {

                os.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

            try {

                s.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

            try {

                ss.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

    }

}