duration java

持續時間類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()方法用于將以天為單位的給定持續時間添加到此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()方法是一個非靜態方法，只能通過類對象訪問，如果嘗試使用類名訪問該方法，則會收到錯誤消息。

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

  plusDays()方法在執行加法時可能會引發異常。

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

  ArithmeticException ：當計算結果超過此Duration的長度時，可能引發此異常。

Syntax:

句法：

    public Duration plusDays(long day_val);

Parameter(s):

參數：

• 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數。

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.

此方法的返回類型為Duration ，它返回的Duration包含將給定天數添加到此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

輸出量

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

翻譯自: https://www.includehelp.com/java/duration-plusdays-method-with-example.aspx

duration java