import java.io.IOException;
import java.net.URI;

import javax.websocket.*;

@ClientEndpoint
public class Client {

    Session session;

    private final static String url = "ws://echo.websocket.org";

    public static void main(String[] args) throws Exception, IOException {
        WebSocketContainer container = ContainerProvider.getWebSocketContainer();
        System.out.println("connecting...");
        container.connectToServer(Client.class,
                URI.create(url));
    }


    @OnMessage
    public void newMessage(String message, Session session) {
        System.out.println(message);
    }
    @OnOpen
    public void newConnection(Session session) throws IOException {
        this.session = session;
        System.out.println("The connection has been started");
        session.getBasicRemote().sendText("hello");

    }
    @OnClose
    public void disconnection() {
        System.out.println("The connection has been ended");
    }
}