多线程样例

   在转Java的开发过程中，为了提高程序性能，经常会有多线程并行执行的需求，我写了下面的demo程序供大家参考使用，如有更好的实现方案欢迎讨论

        public class MyThreadTest {
    public static void main(String[] args) throws InterruptedException {

        final List<ThreadSaveOrderStrategy> subOrders = new ArrayList();
        PkgOrderStrategy pkgOrderStrategy = new PkgOrderStrategy();
        subOrders.add(pkgOrderStrategy);

        PkgOrderPlusStrategy pkgOrderPlusStrategy = new PkgOrderPlusStrategy();
        subOrders.add(pkgOrderPlusStrategy);

        int threadNum = 2;
        // 初始化countDown
        final CountDownLatch threadSignal = new CountDownLatch(threadNum);
        // 创建固定长度的线程池  
        ExecutorService executor = Executors.newFixedThreadPool(threadNum);

        long startTime = System.currentTimeMillis();
        for (int i = 0; i < threadNum; i++) {
            final int finalI = i;
            Runnable task = new Runnable() {
                @Override
                public void run() {
                    try {
                        ActResult at = subOrders.get(finalI).process();
                    } catch (Exception ex) {
                    } finally {
                        threadSignal.countDown();
                    }
                }
            };
            // 执行
            executor.execute(task);
        }

        threadSignal.await();// 等待所有子线程执行完
        executor.shutdown();//固定线程池执行完成后将释放掉资源退出主进程

        long endTime = System.currentTimeMillis();//记录结束时间
        System.out.println("整体耗时：" + TypeConverter.toString((float) (endTime - startTime)));
    }
}