确定Executors.newSingleThreadExecutor（）创建的线程数。执行？(Determining the number of threads created by Executors.newSingleThreadExecutor().execute?)

 我有一个包含50个不同的newSingleThreadExecutor（）代码实例的大型Android项目，这些实例由各种不可预测的事件触发，包括按下UI按钮。 在研究了一下之后，我认为为50个不同的代码实例中的每一个创建了一个单独的线程，并且将保持对执行程序的调用的执行顺序。 
 
 创建了多少个线程，并且在按执行程序调用的顺序维护顺序执行时出现问题？ 
 
 注意：代码不使用submit，这就是为什么我对执行顺序和创建的线程数感到困惑。 例如，如果用户非常快速地按下UI按钮一百次会发生什么？ 根据数据库期货何时完成，我会在不同时间完成一百个线程吗？ 
 
 下面列出了在所有50个实例中如何格式化代码。 
 
Executors.newSingleThreadExecutor().execute(new Runnable() {
    @Override
        public void run()
        { 
            // Executes multiple database calls using futures and
            // Uses get() which waits if necessary for the computation to complete, 
            // and then retrieves its result.
        }
    });

I have a large Android project with 50 distinct code instances of the newSingleThreadExecutor() that are triggered by various unpredictable events including UI button presses. After researching a bit, I think that a single thread is created for each of the 50 distinct code instances and will maintain sequential order of execution of calls to the executor. 
 
How many threads are created and is there a problem in maintaining sequential execution in order of calls to the executor? 
 
Note: the code is not using submit so this is why I am confused about the order of execution and number of threads created. For example, what happens if a user presses the UI button an hundred times very fast? Will I get a hundred threads finishing at different times based on when the database futures complete?
 
Listed below is how the code is formatted in all 50 instances. 
 
Executors.newSingleThreadExecutor().execute(new Runnable() {
    @Override
        public void run()
        { 
            // Executes multiple database calls using futures and
            // Uses get() which waits if necessary for the computation to complete, 
            // and then retrieves its result.
        }
    });

原文：https://stackoverflow.com/questions/21418735