Client

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package SocketProgramming3_ECHO;

import java.io.IOException;
import java.net.Socket;
import java.io.*;

/**
 *
 * @author acer
 */
public class Client {

    private static final String SERVER_IP="localhost";
    private static final int SERVER_PORT=9090;

    public static void main(String[] args) throws IOException {
        System.out.println("[Client] Client Started");
        Socket client=new Socket(SERVER_IP,SERVER_PORT);


        /////////////////getting input from user//////////////////////////////////////////
        System.out.println("[Client]: enter a string ");
        BufferedReader userInput=new BufferedReader(new InputStreamReader(System.in));
        String input=userInput.readLine();

        ///////////////////sending request through socket/////////////////////////////
        PrintWriter out=new PrintWriter(client.getOutputStream(),true);
        out.println(input);

        ///////////////////Getting reply from socket/////////////////////////////
        BufferedReader ServerReplyInput=new BufferedReader(new InputStreamReader(client.getInputStream()));
        String ServerReply=ServerReplyInput.readLine();
        System.out.println("[Server]"+ServerReply);
        client.close();



    }
}