java URL working on browser but not in client program

PHP Snippet 1:

-Dhttp.proxyHost=yourProxyHost -Dhttp.proxyPort=yourProxyPort -Dhttps.proxyHost=yourProxyHost -Dhttps.proxyPort=yourProxyPort

PHP Snippet 2:

HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create("https://example.com"))
                .headers("User-Agent","Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36")      
                .POST(HttpRequest.BodyPublishers.noBody())
                .build();