test network connectivity from jshell

gistfile1.txt

import java.net.*;
import java.net.http.*;
import javax.net.ssl.*;
import java.security.cert.*;
var trustAllCerts = new TrustManager[]{
    new X509TrustManager() {
        public X509Certificate[] getAcceptedIssuers() { return null; }
        public void checkClientTrusted(X509Certificate[] certs, String authType) { }
        public void checkServerTrusted(X509Certificate[] certs, String authType) { }
    }
};
var sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
var url = "http://google.com"; 
var client = HttpClient.newHttpClient();
var request = HttpRequest.newBuilder() .uri(URI.create(url)).GET().build();
var response = client.send(request, HttpResponse.BodyHandlers.ofString());
var responseBody = response.body();