public class ThreadFactoryTest {
    public static void main(String[] args) throws Exception{
        java.util.concurrent.ThreadFactory threadFactory = new java.util.concurrent.ThreadFactory() {
            @Override
            public Thread newThread(Runnable r) {
                Thread thread = newThread(r);
                thread.setPriority(Thread.MAX_PRIORITY);
                return thread;
            }
        };

        threadFactory.newThread(new ThreadFactory.MyRun()).start();

    }

    static class MyRun implements Runnable {
        @Override
        public void run() {
            System.out.println("started");
        }
    }
}