Without keystore, both the server and client will fail. This video show how to generate keystore using keytool program. Then run server and client with keystore and password. Type the following command in your command window to create a keystore n

JavaSSLServer.java

package javasslserver;
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.net.ssl.SSLServerSocketFactory;
 
/**
 * @web http://java-buddy.blogspot.com/
 */
public class JavaSSLServer {
     
    static final int port = 8000;
 
    public static void main(String[] args) {
         
         
        SSLServerSocketFactory sslServerSocketFactory = 
                (SSLServerSocketFactory)SSLServerSocketFactory.getDefault();
         
        try {
            ServerSocket sslServerSocket = 
                    sslServerSocketFactory.createServerSocket(port);
            System.out.println("SSL ServerSocket started");
            System.out.println(sslServerSocket.toString());
             
            Socket socket = sslServerSocket.accept();
            System.out.println("ServerSocket accepted");
             
            PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
            try (BufferedReader bufferedReader = 
                    new BufferedReader(
                            new InputStreamReader(socket.getInputStream()))) {
                String line;
                while((line = bufferedReader.readLine()) != null){
                    System.out.println(line);
                    out.println(line);
                }
            }
            System.out.println("Closed");
             
        } catch (IOException ex) {
            Logger.getLogger(JavaSSLServer.class.getName())
                    .log(Level.SEVERE, null, ex);
        }
    }
     
}