【JAVA多线程实战-结果同步】

• 线程池
• • ThreadPoolExecutor
• 线程
• • Callable
• 示例
• • 使用线程
  • 不使用线程

ExecutorService EXECUTOR = new ThreadPoolExecutor(10, 20, 30L, TimeUnit.SECONDS,
            new LinkedBlockingQueue<>(1024), ThreadFactoryBuilder.create().setNamePrefix("Bind-Executor-").build());

param1:核心线程数
param:2:最大线程数
param3:闲置时间（到达闲置时间自动关闭线程）
param4:闲置时间单位
param5:等待缓存区
param6:创建一个新线程

public static class DemoThread implements Callable {
        private Integer total;
        DemoThread(Integer total){
            this.total = total;
        }

        @Override
        public Integer call() throws Exception {
            Thread.sleep(1000);
            return total += 1;
        }
    }

public static void test() throws ExecutionException, InterruptedException {
        long start = System.currentTimeMillis();
        LinkedList> futures = new LinkedList<>();
        LinkedList result = new LinkedList<>();
        for (int i = 0; i < 100; i++) {
            Future submit = EXECUTOR.submit(new DemoThread(i));
            futures.add(submit);
        }
        for (Future f : futures){
            while (true){
                if(f.isDone() && !f.isCancelled()){
                    result.add(f.get());
                    break;
                }
            }
        }
        System.out.println("test:" + result.toString());
        EXECUTOR.shutdown();
        System.out.println("test:" + "运行时长" + (System.currentTimeMillis() - start) + "ms");
    }

结果：

public static void test2() throws InterruptedException {
        long start = System.currentTimeMillis();
        LinkedList result = new LinkedList<>();
        for (int i = 0; i < 100; i++) {
            int bi = i + 1;
            Thread.sleep(1000);
            result.add(bi);
        }
        System.out.println("test2:" + result.toString());
        System.out.println("test2:" + "运行时长" + (System.currentTimeMillis() - start) + "ms");
    }

结果: