Java获取两个日期之间的秒数

Question

我每10秒钟发送一次数据， 所以我尝试使用我编写的代码 但我认为我在转换到秒时犯了一个错误？

Calendar Time= Calendar.getInstance();
Calendar SendDate= Calendar.getInstance();

long upload = TimeBetweenDates(SendTime,Time);

if (upload > 10000) {
    String udp = "OK";
    SendUDP(udp);
    SendTime = Calendar.getInstance();
}


public static long TimeBetweenDates (Calendar Start , Calendar End) {
    long end = End.getTimeInMillis();
    long start = Start.getTimeInMillis();

    return TimeUnit.MILLISECONDS.toSeconds(Math.abs(end - start)); 
}

Answer 1

如果你＆＃34;尝试每隔10秒发送一次数据＆＃34;，你可以这样做

ScheduledExecutorService service = Executors.newScheduledThreadPool();

service.scheduleAtFixedRate(() -> sendUdp("OK"), 10, 10, TimeUnit.SECONDS);