package wzh.daemon;

import java.util.concurrent.ThreadFactory;

public class DaemonThreadFactory implements ThreadFactory {

    @Override
    public Thread newThread(Runnable r) {
        Thread t = new Thread(r);
        t.setDaemon(true);
        return t;
    }

    
}

package wzh.daemon;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

public class DaemonFromFactory implements Runnable {
    public static void main(String[] args) throws InterruptedException {
        ExecutorService exec = Executors
                .newCachedThreadPool(new DaemonThreadFactory());
        for (int i = 0; i < 10; i++) {
            exec.execute(new DaemonFromFactory());
        }
        System.out.println("All daemons started");
        TimeUnit.MILLISECONDS.sleep(50000);
    }

    @Override
    public void run() {
        try {
            while (true) {
                TimeUnit.MILLISECONDS.sleep(100);
                System.out.println(Thread.currentThread() + " " + this);
            }
        } catch (Exception e) {
            System.out.println("Interrupted");
        }
    }

}