Countdownlatch thread starts multiple threads and counts the time that all threads consume

simulates starting 3,000 threads, concurrently executing and counting the time it takes for all threads to finish executing.

Import Java.util.HashMap;
Import Java.util.Map;

Import Java.util.concurrent.CountDownLatch; public class Threadhttps {public static void main (string[] args) {try {long start = System.currenttimemillis (
			); Countdownlatch startlatch=new Countdownlatch (300);//How many threads need to wait to start Countdownlatch endlatch=new Countdownlatch (300);// How many threads need to wait to finish after for (int i =0;i<300;i++) {map<string, string> Map = new hashmap<string, string&
	        	gt; ();
	    		Start both threads and go to call BS20102 MyThread myThread1 = new MyThread ("" +i,map,startlatch,endlatch);
	    		Mythread1.start ();
	        Startlatch.countdown ();
	        } endlatch.await ();//wait for all workers to complete the work long end = System.currenttimemillis (); 
		System.out.println ("Time spent on all work completed:" + (End-start) + "milliseconds");
		} catch (Exception e) {e.printstacktrace ();
			}} public static class MyThread extends thread{private String tradetype;
			Private map<string, string> Map; Private Countdownlatch Startlatch;
			Private Countdownlatch Endlatch; Public MyThread (String tradetype,map<string, string> Map, Countdownlatch startlatch,countdownlatch endlatch) {th
				Is.tradetype =tradetype;
				This.map = map;
				This.startlatch=startlatch;
			This.endlatch=endlatch;
										
				} public void Run () {System.out.println ("Latch.getcount:" + startlatch.getcount ());
					try {while (Startlatch.getcount ()! = 0) {thread.sleep (10);
					} Long start = System.currenttimemillis ();
					System.out.println ("Tradetype:" + Tradetype + ", ~ ~ ~ Start Execution ~ ~ ~");
					Thread.Sleep (3000);
					Long end = System.currenttimemillis ();
					
					System.out.println ("Tradetype:" +tradetype+ ", Thread Consumption time" + (End-start));
					Endlatch.countdown ();//After the thread content is executed, the counter is reduced by one} catch (Interruptedexception e) {//TODO auto-generated catch block
				E.printstacktrace ();
 }			
			}
		}
}