【说站】java线程池死锁的产生及处理

final ExecutorService executorService =
        Executors.newSingleThreadExecutor();
Future<Long> f1 = executorService.submit(new Callable<Long>() {
 
    public Long call() throws Exception {
        System.out.println("start f1");
        Thread.sleep(1000);//延时
        Future<Long> f2 =
           executorService.submit(new Callable<Long>() {
 
            public Long call() throws Exception {
                System.out.println("start f2");
                return -1L;
            }
        });
        System.out.println("result" + f2.get());
        System.out.println("end f1");
        return -1L;
    }
});