Java 实现倒计时（由秒计算天、小时、分钟、秒）

public class Countdown4 {
    private static long day = 0;
    private static long hour = 0;
    private static long minute = 0;
    private static long second = 0;

    private static boolean dayNotAlready = false;
    private static boolean hourNotAlready = false;
    private static boolean minuteNotAlready = false;
    private static boolean secondNotAlready = false;

    public static void main(String[] args) {
        long totalSeconds = 60 * 60 * 24 * 1 + 1;
        initData(totalSeconds);

        new Timer().schedule(new TimerTask() {
            @Override
            public void run() {
                if (secondNotAlready) {
                    startCount();
                } else {
                    cancel();
                }
            }
        }, 0, 1000);
    }

    private static void initData(long totalSeconds) {
        resetData();

        if (totalSeconds > 0) {
            secondNotAlready = true;
            second = totalSeconds;
            if (second >= 60) {
                minuteNotAlready = true;
                minute = second / 60;
                second = second % 60;
                if (minute >= 60) {
                    hourNotAlready = true;
                    hour = minute / 60;
                    minute = minute % 60;
                    if (hour > 24) {
                        dayNotAlready = true;
                        day = hour / 24;
                        hour = hour % 24;
                    }
                }
            }
        }
        System.out.println("初始化格式化后->" + day + "天" + hour + "小时" + minute
                + "分钟" + second + "秒");
    }

    private static void resetData() {
        day = 0;
        hour = 0;
        minute = 0;
        second = 0;
        dayNotAlready = false;
        hourNotAlready = false;
        minuteNotAlready = false;
        secondNotAlready = false;
    }

    public static void startCount() {
        if (secondNotAlready) {
            if (second > 0) {
                second--;
                if (second == 0 && !minuteNotAlready) {
                    secondNotAlready = false;
                }
            } else {
                if (minuteNotAlready) {
                    if (minute > 0) {
                        minute--;
                        second = 59;
                        if (minute == 0 && !hourNotAlready) {
                            minuteNotAlready = false;
                        }

                    } else {
                        if (hourNotAlready) {
                            if (hour > 0){
                            hour--;
                            minute = 59;
                            second = 59;
                            if (hour == 0 && !dayNotAlready) {
                                hourNotAlready = false;
                            }
                        } else {
                                if (dayNotAlready) {
                                    day--;
                                    hour = 23;
                                    minute = 59;
                                    second = 59;
                                    if (day == 0) {
                                        dayNotAlready = false;
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
        System.out.println("解除禁言倒计时：" + day + "天" + hour + "小时" + minute
        + "分钟" + second + "秒");
    }
}