Date calculation and comparative operation guide in Kotlinx Datetime
Date calculation and comparative operation guide in Kotlinx Datetime
Kotlinx DateTime is a powerful library for the operation date and time. It provides a variety of functions and operators, making the date calculation and relatively simple.This article will introduce the dated calculation and comparative operations commonly used in Kotlinx Datetime, and provide the corresponding Java code example.
1. Get the current date and time
To get the current date and time, you can use the method of `clock.system.now ().The following is an example of obtaining the current date and time:
DateTime now = Clock.System.now();
2. Compare two dates
KOTLINX DATETIME provides the `Compareto () method to compare the sequence of two dates.The return value is a `kotlin.comParisonResult` enumeration type, and you can obtain the integer value of the comparison result through the` Ordinal () "method.Here are a sample of comparing two dates:
Datetime date1 = // The first date
Datetime date2 = // The second date
ComparisonResult result = date1.compareTo(date2);
if (result.ordinal() < 0) {
System.out.println ("Date1 before date2");
} else if (result.ordinal() > 0) {
System.out.println ("Date1 after date2");
} else {
System.out.println ("Date1 and Date2");
}
3. Add or minus the time interval
Kotlinx DateTime provides a method for `plus () and` minus () `to add or minus the specified time interval.Below is an example of adding and subtracting time interval:
Datetime date = // Original date
Datetime plusdate = date.plus (duration.hours (2)); // add 2 hours
Datetime minusdate = date.minus (duration.Days (1)); // minus 1 day
4. Calculate the interval between two dates
KOTLINX DATETIME provides a `Until () method to calculate the time interval between two dates.The following is an example of calculating the interval between two dates:
Datetime date1 = // The first date
Datetime date2 = // The second date
Duration duration = date1.until(date2);
System.out.println ("The daily interval is: + duration.getmilliseconds () +" milliseconds ");
5. Compare the equal nature of two dates
Kotlinx DateTime provides `Equals () and` Compareto () 'to compare the equivalent of two dates.Below is an example of comparative two dates:
Datetime date1 = // The first date
Datetime date2 = // The second date
if (date1.equals(date2)) {
System.out.println ("Date1 and Date2");
} else {
System.out.println ("Date1 and Date2");
}
Summarize
By using Kotlinx Datetime, we can easily calculate and compare the date.This article introduces how to obtain the current date and time, compare two dates, add or subtract the time interval, calculate the interval between the two dates, and compare the equal nature of the two dates, and provide the corresponding Java code example.I hope this article will help you understand the common operations of Kotlinx Datetime.
