在Java中运行执行不同工作的多个线程的正确方法是什么？

Question

I am trying to build a network related program in Java. I have previous experience with C. In C, when you run thread, you define which method you want it to be run as a thread.

However, in Java, it seems that thread always runs with method run() and there can be 1 method with that name in each class.

I want to have at least 2 threads, one thread for working on calculations, and one thread to work on communications with other applications. (Even if this can be done with 1 thread, I just want to know what would be a correct way to run 2 threads that does totally different jobs)

Below is just a sample code how I implemented the thread. If thread generated by below codes does communication, what would be a nice way to create another thread that does calculation?

public class Server implements Runnable{

    static Thread myThread;


    public void run() {
        // TODO Auto-generated method stub  
    }

    public static void main(String[] args) {
        myThread = new Thread(new Server());
    }


}

Answer 1

Don't put a main method in the class that implements Thread or Runnable . You could implement what you want with your current Server implementation, but I don't see a good reason to do so. Separate out the concerns, and KISS:

• One boring, simple class with a public static void main(String[] args) method
• One Server implements Runnable class (one type of thread)
• One Calculations implements Runnable class (the other type of thread)

The class with the main method would start the Server and Calculations threads.

Answer 2

Use Executors.newSingleThreadExecutor() to create a thread pool containing a single thread. Submit Callable objects to this Executor , where each instance will perform one of your calculations. A Future object is returned that can be used to fetch the result of the calculation. The calculation itself will be running in a thread managed by the Executor.