How java uses the Date.compareTo () method
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Date.compareTo ()
Java.util.Date provides a classic method, compareTo (), to compare two dates in Java.
If the two dates are equal, the return value is 0.
If Date is after the date parameter, the return value is greater than 0.
If Date precedes the date parameter, the return value is less than 0.
@ Test
Void testDateCompare () throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat ("yyyy-MM-dd")
Date date1 = sdf.parse ("2009-12-31")
Date date2 = sdf.parse ("2019-01-31")
System.out.println ("date1:" + sdf.format (date1))
System.out.println ("date2:" + sdf.format (date2))
If (date1.compareTo (date2) > 0) {
System.out.println ("Date1 time is after Date2")
} else if (date1.compareTo (date2) < 0) {
System.out.println ("Date1 time is before Date2")
} else if (date1.compareTo (date2) = = 0) {
System.out.println ("Date1 time equals Date2")
} else {
System.out.println ("how did the program get here? it should not be normal")
}
}
Output result:
Date1: 2009-12-31
Date2: 2019-01-31
Date1 time before Date2, thank you for reading! This is the end of the article on "how java uses the Date.compareTo () method". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!
