Android provides multiple approaches for retrieving system time, including Calendar, Date, and currentTimeMillis methods. Calendar Approach The Calendar method requires obtaining an instance through Calendar.getInstance(), setting the timezone (China uses GMT+8:00), and then using Calendar.get() to...
Using the Legacy Date Class The Date object represents a specific instent in time with millisecond precision. Note that many methods in this class are deprecated in favor of Calendar. getTime(): Returns the number of milliseconds since January 1, 1970, 00:00:00 GMT. getYear(): Returns the year minus...
Java provides several approaches for comparing dates represented as strings. The choice of method depends on formatting consistnecy and precision requirements. Lexicographic Comparison with String.compareTo The compareTo method in String compares characters sequentially using their Unicode values. W...