Java 中线程优先级到底做什么

Question

我目前正在做一个用 java 编写的 android 项目。我有一个仪表板，它从 cloudant 数据库查询数据并在图形上呈现数据。然而，数据必须在收到时进行处理。
我有 4 个 AsyncTasks，它们同时（或应该）处理 doInBackground Override 方法中接收到的数据。这个过程很慢，我试过这条线

Thread.currentThread().setPriority(Thread.MAX_PRIORITY);

在每个 AsyncTask 中。
但是，4个AsynkTasks好像都是一个接一个发生，是不是线程的优先级改成了max？更改线程优先级时，是否会停止所有其他线程并仅继续执行一个线程直到完成？

Answer 1

发件人：https://docs.oracle.com/javase/7/docs/api/java/lang/Thread.html

Every thread has a priority. Threads with higher priority are executed in preference to threads with lower priority. Each thread may or may not also be marked as a daemon. When code running in some thread creates a new Thread object, the new thread has its priority initially set equal to the priority of the creating thread, and is a daemon thread if and only if the creating thread is a daemon.

（注意：此信息是通过在 google 中搜索 "java Thread.MAX_PRIORITY" 并查看顶部结果找到的）

Answer 2

From the documentation:

Every thread has a priority. Threads with higher priority are executed in preference to threads with lower priority. ... When code running in some thread creates a new Thread object, the new thread has its priority initially set equal to the priority of the creating thread.

从字面上看，这只是一个提示，告诉调度程序大致按照什么顺序执行线程。它可以而且很可能会忽略你。

如果您已将所有线程的优先级设置为最大，这与将它们保留为默认值实际上是一样的。正如你可能不得不告诉你的老板，如果一切都是最重要的，那么没有什么是最重要的:)

Java 中线程优先级到底做什么

What exactly does thread priority do in Java

java

android-asynctask

thread-priority