Java Equivalent of C# HttpAgent

We need to convert a C# application to Java.  What would the Java equivalent of this C# code  be:

String sXmlRequest = "...";
String sUrl = "...";
String sCertificate = "...";
Fmr.Commons.Web.Http.HttpAgent obj = new HttpAgent();
Fmr.Commons.Web.Http.HttpAgentRequest objRequest = new HttpAgentRequest();
Fmr.Commons.Web.Http.HttpConnectionOverride objConnectionOverride = new HttpConnectionOverride();
Fmr.Commons.Web.Http.HttpAgentResponse objResponse = new HttpAgentResponse();
objRequest.SendData = sXmlRequest;
objRequest.ContentType = "text/xml";
objRequest.KeepAlive = KeepAliveType.Persisted;
objConnectionOverride.Host = sUrl;
objConnectionOverride.SslStore = sCertificate;
String xmlResponse = obj.Request(objRequest, objConnectionOverride).Text.TrimStart();