duration java

持續(xù)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(xù)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(tài)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(zhí)行加法時可能會引發(fā)異常。

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

  ArithmeticException ：當(dāng)計算結(jié)果超過此Duration的長度時，可能引發(fā)此異常。

Syntax:

句法：

public Duration plusDays(long day_val);

Parameter(s):

參數(shù)：

• 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(shù)。

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(shù)添加到此Duration中的值。

Example:

例：

// Java program to demonstrate the example // of plusDays(long day_val) method of Durationimport java.time.*;public class PlusDaysOfDuration {public static void main(String args[]) {long days = 2;// Instantiates two Duration objectsDuration 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_valSystem.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_valSystem.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

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