How to pass parameter to an already running thread in java?

Question

How to pass parameter to an already running thread in java -- not in the constructor, & probably without using wait() (possible ??)

Something similar to a comme

Answer 1

Maybe what you really need is blocking queue.When you create the thread, you pass the blocking queue in and the thread should keep checking if there is any element in the queue. Outside the thread, you can put elements to the queue while the thread is "running". Blocking queue can prevent the thread from quit if their is nothing to do.

public class Test {
    public static void main(String... args) {

        final BlockingQueue queue = new LinkedBlockingQueue();
        Thread running = new Thread(new Runnable() {
            @Override
            public void run() {
                while (true) {
                    try {
                        String data = queue.take();
                        //handle the data
                    } catch (InterruptedException e) {
                        System.err.println("Error occurred:" + e);
                    }
                }
            }
        });

        running.start();
        // Send data to the running thread
        for (int i = 0; i < 10; i++) {
            queue.offer("data " + i);
        }
    }
}