Java运行线程cykllu，等待线程完成

Question

我需要在四个并行线程的循环中运行，这将是最近处理和线程的事情，所以循环开始了Dasle 4并行线程。我试图实现，但循环开始超过4个线程。我想念是否有线程完成。你能告诉我吗？谢谢。

Answer 1

1. 使用您的工作创建列表。
2. 将您的作业包装在实现Runnable接口的某个类中。
3. 创建将从队列
执行作业的线程

类似的东西：

// This will run your jobs in threads
ExecutorService threadPoolExecutor = Executors.newFixedThreadPool(NUMBER_OF_THREADS);

// Adding new jobs to list
List<Job> processingList= Collections.synchronizedList(new ArrayList<Job>());
processingList.add(someJob1);
processingList.add(someJob2);
processingList.add(someJob3);
processingList.add(someJob4);

...

Runnable processor = new Runnable() {
    public void run() {
        // Run all jobs from List in threads
        for (Job job : processingList) {
            threadPoolExecutor.execute(job);
        }

        // wait till jobs are completed
        boolean areJobsCompleted = false;
        while(!areJobsCompleted) {
            boolean areJobsCompleted = true;

            for (Job job : processingList) {
                areJobsCompleted = areJobsCompleted && job.isComplete();
            }
        }
    }
};

Executors.newSingleThreadExecutor().execute(processor);