Using multithreading to simulate multiple users concurrent access to one or more tomcat, test performance Java__java

Java code    package test;      import java.net.httpurlconnection;    import java.net.sockettimeoutexception;   import java.net.url;   Import  java.net.URLConnection;   import java.util.concurrent.countdownlatch;       import org.apache.log4j.logger;      public class callhttprequest  implements runnable {       private static logger log  = logger.getlogger (callhttprequest.class);       public   static int successrequest = 0;       public  static  int failRequest = 0;       public  static int  timeOutRequest = 0;       private final String  hoststring =  "http://localhost:";       private String port;       private String puductPartURL;           private CountDownLatch begin;       private countdownlatch  end;          callhttprequest (string port, string  puductparturl, countdownlatch begin,                countdownlatch end)  {            this.port = port;            this.puductparturl = puductparturl;            this.begin = begin;           this.end =  end;       }           private string makefullurl ()  {           return hostString + port +  puductparturl;          }       private   static synchronized void incrementsuccesscount () {             successRequest++;       }               private  static synchronized void  incrementfailcount () {            failRequest++;        }               Private static synchronized void incrementtimeoutcount () {             timeoutrequest++;       }                @Override        public void run ()  {            string urlstr = makefullurl ();            URL url;            try {                begin.await ();                Url = new url (URLSTR);                urlconnection urlconnection = url.openconnection ();                HttpURLConnection httpConnection =  ( HttpURLConnection) &NBSp urlconnection;                Httpconnection.setconnecttimeout (3000);                int responsecode = httpconnection.getresponsecode ();                if  (responsecode ==  HTTPURLCONNECTION.HTTP_OK)  {                    incrementsuccesscount ();                } else {                    incrementfailcount ();                }            } catch  (sockettimeoutexception e)  {                Incrementtimeoutcount ();                Log.error (E.getmessage (),  e);           } catch   (exception e)  {                log.error (E.getmessage (),  e);           }  finally {                End.countdown ();           }           }     }  

Java code Package test;   Import Java.io.BufferedReader; Import Java.io.FileReader;