Date类中的getMinute和getSecond方法都过时了,不推荐使用,如果需要得到分和秒,请用Calendar
Date date = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
if (calendar.get(Calendar.MINUTE) == 0 && calendar.get(Calendar.SECOND) == 0) {
MainFrame mainFrame = new MainFrame();
mainFrame.setVisible(true);
setSleepTime(sleepTime);
}

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