import java.util.concurrent.ExecutorService;

 import java.util.concurrent.Executors;

 import java.util.concurrent.Semaphore;

 public class ThreadTest {

     private static int thread_num = 500;

     private static int client_num = 5000;

     public static void main(String[] args,String no) {

         ExecutorService exec = Executors.newCachedThreadPool();

         final Semaphore semp = new Semaphore(thread_num);

         for (int index = 0; index < client_num; index++) {

             final int NO = index;

             Runnable run = new Runnable() {

                 public void run() {

                     try {

                         semp.acquire();

                         //HttpClientTest.postLogin();

                         System.out.println("Thread:" + NO);

                         semp.release();

                     } catch (Exception e) {

                         e.printStackTrace();

                     }

                 }

             };

             exec.execute(run);

         }

         exec.shutdown();

     }

 }