duration java

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

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

  plusDays()方法在java.time包中可用。

• plusDays() method is used to add the given duration in days to this Duration and return the Duration.

  plusDays()方法用于将以天为单位的给定持续时间添加到此Duration中，并返回Duration。

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

  plusDays()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。

• plusDays() method may throw an exception at the time of performing addition.

  plusDays()方法在执行加法时可能会引发异常。

  ArithmeticException: This exception may throw when the calculated results exceed the length of this Duration.

  ArithmeticException ：当计算结果超过此Duration的长度时，可能引发此异常。

Syntax:

句法：

    public Duration plusDays(long day_val);

Parameter(s):

参数：

• long day_val – represents the day value to add to this Duration.

  long day_val –表示要添加到此工期的天数。

Return value:

返回值：

The return type of this method is Duration, it returns the Duration that holds the value added the given days to this Duration.

此方法的返回类型为Duration ，它返回的Duration包含将给定天数添加到此Duration中的值。

Example:

例：

// Java program to demonstrate the example 
// of plusDays(long day_val) method of Duration
import java.time.*;
public class PlusDaysOfDuration {
public static void main(String args[]) {
long days = 2;
// Instantiates two Duration objects
Duration du1 = Duration.ofDays(3);
Duration du2 = Duration.parse("P2DT20M");
// Display du1, du2 
System.out.println("du1: " + du1);
System.out.println("du2: " + du2);
System.out.println("days to add: " + days);
System.out.println();
// adds the given duration in days with this
// Duration du1 and returns the Duration 
// i.e. here we are adding the given 2 days 
// with this du1 that holds the value of 3 days 
// i.e.( 72 hrs + 48 hrs = 120 hrs )
Duration plus_val = du1.plusDays(days);
// Display plus_val
System.out.println("du1.plusDays(days): " + plus_val);
// adds the given duration in days with this 
// Duration du2 and returns the Duration 
// i.e. here we are adding the given 2 days 
// with this du2 that holds the value of 2D:20M 
// i.e.( 48 hrs + 48 hrs = 96 hrs )
plus_val = du2.plusDays(days);
// Display plus_val
System.out.println("du2.plusDays(days): " + plus_val);
}
}

Output

输出量

du1: PT72H
du2: PT48H20M
days to add: 2du1.plusDays(days): PT120H
du2.plusDays(days): PT96H20M

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

duration java