Get wss://ws-feed.gdax.com stream

HelloWSS.java

import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import com.neovisionaries.ws.client.WebSocket;
import com.neovisionaries.ws.client.WebSocketAdapter;
import com.neovisionaries.ws.client.WebSocketFactory;

/**
 * Mendekotasunak:  (maven bidez instalatu)
 * 		gson-2.8.2
 *      nv-websocket-client-2.3
 *      
 * @author juanan
 *
 */
public class HelloWSS
{
    public static void main(String[] args) throws Exception
    {
    	
    	JsonArray ja = new JsonArray();
    	ja.add("BTC-EUR");
        ja.add("ETH-EUR");

        JsonObject jo = new JsonObject();
    	jo.addProperty("type", "subscribe");
    	jo.add("product_ids", ja);
    	
        
    	
    	System.out.println(jo.toString());    	
    	
/*    initialMessage = {
    			  "type": "subscribe",
    	          "product_ids": [ "BTC-EUR", "ETH-EUR"]
    	          }
    	
*/    	
    	
    	
        // Connect to "wss://" and send your message to it.
        // When a response from the WebSocket server is received, print it
        // Don't forget to close the WebSocket connection 
        new WebSocketFactory()
            .createSocket("wss://ws-feed.gdax.com")
            .addListener(new WebSocketAdapter() {
                @Override
                public void onTextMessage(WebSocket ws, String message) {
                    // Received a response. Print the received message.
                    System.out.println(message);

                    // Close the WebSocket connection.
                   // ws.disconnect();
                }
            })
            .connect()
            .sendText(jo.toString());
    }
}