java - 在java中创建线程以在后台运行

Question

我想从我的主 java 程序中生成一个 Java 线程，并且该线程应该单独执行而不干扰主程序。应该是这样的:

1. 用户启动的主程序
2. 做一些业务工作，应该创建一个可以处理后台进程的新线程
3. 一旦创建线程，主程序不应等到生成的线程完成。事实上它应该是无缝的..

Answer 1

一种直接的方法是自己手动生成线程:

public static void main(String[] args) {

     Runnable r = new Runnable() {
         public void run() {
             runYourBackgroundTaskHere();
         }
     };

     new Thread(r).start();
     //this line will execute immediately, not waiting for your task to complete
}

或者，如果您需要生成多个线程或需要重复执行，您可以使用更高级别的并发 API 和执行器服务:

public static void main(String[] args) {

     Runnable r = new Runnable() {
         public void run() {
             runYourBackgroundTaskHere();
         }
     };

     ExecutorService executor = Executors.newCachedThreadPool();
     executor.submit(r);
     // this line will execute immediately, not waiting for your task to complete
     executor.shutDown(); // tell executor no more work is coming
     // this line will also execute without waiting for the task to finish
    }