证明创建runnable实例和普通类时间一样长

import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

//证明创建runnable实例和普通类时间一样长

public class Test002 {

   private ConcurrentLinkedQueue<String> queue = new ConcurrentLinkedQueue<String>();
// private ArrayList<String> queue = new ArrayList<String>();
// private CyclicBarrier barrier = new CyclicBarrier(10000000);
   private CountDownLatch latch = new CountDownLatch(100000);
   ExecutorService es = Executors.newFixedThreadPool(4);

   public static void main(String[] args) {
      Test002 test001 = new Test002();
      long timeStart = System.currentTimeMillis();
      test001.begin();
      System.out.println("##线程类实例化10000次时间:"+(System.currentTimeMillis()-timeStart));

      timeStart = System.currentTimeMillis();
      test001.begin2();
      System.out.println("##普通类实例化10000次时间:"+(System.currentTimeMillis()-timeStart));

   }

   public void begin(){
      for (int i = 0; i < 10000; i++) {
         Runnable001 runnable001 = this.new Runnable001(i);
      }
   }
   public void begin2(){
      for (int j = 0; j < 10000; j++) {
         Runnable002 Runnable002 = this.new Runnable002(j);
//       new Thread(); // 时间主要花在创建线程上,使用runnable接口不占用时间
      }
   }

private class Runnable001 implements Runnable{
      private int value;
      public Runnable001(int value) {
         this.value = value;
      }

      public void run() {

         try {
//          barrier.await();
         } catch (Exception e) {
            e.printStackTrace();
         }
         queue.offer(value + "");
         latch.countDown();//latch计数减一
      }

   }
   private class Runnable002 {
      private int value;
      public Runnable002(int value) {
         this.value = value;
      }

      public void run() {

         try {
//          barrier.await();
         } catch (Exception e) {
            e.printStackTrace();
         }
         queue.offer(value + "");
         latch.countDown();//latch计数减一
      }

   }
}

转载于:https://www.cnblogs.com/fengdaren/p/9765922.html