java多线程注意点

多线程执行的程序抛出异常主线程是无法捕获的，要谨慎用，最好用Callable

        ScheduledFuture<?> scheduledFuture = executorService.scheduleAtFixedRate(new Runnable() {
@Override
public void run() {

synchronized (handlerAndTimer) {

                    System.out.println("定时任务执行");
if (counter++ == 5) {
throw new RuntimeException("退出当前线程");
                    }

                }
            }
        }, 1, 4, TimeUnit.SECONDS);

Callable

ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
        Future<Object> submit = executorService.submit(new Callable<Object>() {
@Override
public Object call() throws Exception {
return null;
            }
        });
        submit.get();