Java determines whether a string is a date

In order to support multiple languages, Java does not have a fixed date format. You need to specify the date format according to your own needs, and then use the DateFormat class or SimpleDateFormat class to determine whether it is the correct date format.

The following example is for reference:

public class DateUtil {
    private static final SimpleDateFormat dateFormat = null;
    static {
        dateFormat = new SimpleDateFormat("yyyy/MM/dd");
        dateFormat.setLenient(false);
    }
    public static boolean isValidDate(String s) {
        try {
            dateFormat.parse(s);
            return true;
        } catch(Exception e) {
            return false;
        }
    }
    public static String formatDate(Date d) {
        return dateFormat.format(d);
    }
}

DateFormat is an abstract class of date/time formatting subclasses that formats and parses dates or times in a language-independent manner.

For more java knowledge, please pay attention to java basic tutorial.

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