持续时间类compareTo()方法 (Duration Class compareTo() method)

• compareTo() method is available in java.time package.

  compareTo()方法在java.time包中可用。

• compareTo() method is used to compare this Duration object to the given object.

  compareTo()方法用于将此Duration对象与给定对象进行比较。

• compareTo() method is a non-static method, it is accessible with class object only and if we try to access the method with class name then we will get an error.

  compareTo()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名访问该方法，则会收到错误消息。

• compareTo() method does not throw an exception at the time of comparing.

  compareTo()方法在比较时不会引发异常。

Syntax:

句法：

    public int compareTo(Duration d);

Parameter(s):

参数：

• Duration d – represents the object to be compared to this Duration object.

  持续时间d –表示要与此持续时间对象进行比较的对象。

Return value:

返回值：

The return type of this method is int, it may return anyone of the given values.

此方法的返回类型为int ，它可以返回任何给定值。

• When (this Duration) == (Duration d), it returns 0.

  当(this Duration)==(Duration d)时，它返回0。

• When (this Duration) < (Duration d), it returns -1.

  当(this Duration)<(Duration d)时，它返回-1。

• When (this Duration) > (Duration d), it returns 1.

  当(this Duration)>(Duration d)时，返回1。

Example:

例：

// Java program to demonstrate the example 
// of int compareTo() method of Duration
import java.time.*;
import java.time.temporal.*;
public class CompareToOfDuration {
public static void main(String args[]) {
// Instantiates three Duration objects
Duration du1 = Duration.ofHours(2);
Duration du2 = Duration.ofMinutes(2);
Duration du3 = Duration.between(LocalTime.MIN, LocalTime.MAX);
System.out.println("du1: " + du1);
System.out.println("du2: " + du2);
System.out.println("du3: " + du3);
System.out.println();
// compares this Duration object(du1)
// to the given Duration object(du2) i.e here
// it returns 1 because the value of du1>du2
int compare = du1.compareTo(du2);
System.out.println("du1.compareTo(du2): " + compare);
// compares this Duration object(du2)
// to the given Duration object(du1) i.e here
// it returns -1 because the value of du2<du1
compare = du2.compareTo(du1);
System.out.println("du2.compareTo(du1): " + compare);
// compares this Duration object(du3)
// to the given Duration object(du3) i.e here
// it returns 0 because the value of du2==du1
compare = du3.compareTo(du3);
System.out.println("du3.compareTo(du3): " + compare);
}
}

Output

输出量

du1: PT2H
du2: PT2M
du3: PT23H59M59.999999999Sdu1.compareTo(du2): 1
du2.compareTo(du1): -1
du3.compareTo(du3): 0

翻译自: https://www.includehelp.com/java/duration-compareto-method-with-example.aspx