Java Duration类| isZero()方法与示例
持續(xù)時間類isZero()方法 (Duration Class isZero() method)
isZero() method is available in java.time package.
isZero()方法在java.time包中可用。
isZero() method is used to check whether this Duration object holds the value of length is 0 or not.
isZero()方法用于檢查此Duration對象是否保持length的值為0。
isZero() 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.
isZero()方法是一個非靜態(tài)方法,只能通過類對象訪問,如果嘗試使用類名稱訪問該方法,則會收到錯誤消息。
isZero() method does not throw an exception at the time of checking 0 lengths.
在檢查0個長度時, isZero()方法不會引發(fā)異常。
Syntax:
句法:
public boolean isZero();Parameter(s):
參數(shù):
None
沒有
Return value:
返回值:
The return type of this method is boolean, it returns true when this Duration value length is 0 otherwise it returns false.
此方法的返回類型為boolean ,當Duration值的長度為0時返回true,否則返回false。
Example:
例:
// Java program to demonstrate the example // of boolean isZero() method of Durationimport java.time.*;public class IsZeroOfDuration {public static void main(String args[]) {// Instantiates three Duration objectsDuration du1 = Duration.ofHours(-10);Duration du2 = Duration.parse("P1DT2H20M");Duration du3 = Duration.ofMinutes(0);// Display du1, du2 and du3System.out.println("du1: " + du1);System.out.println("du2: " + du2);System.out.println("du3: " + du3);System.out.println();// checks whether the value// of this Duration (du1) is zero// or not i.e here it returns false because// the value of du1 is not 0boolean status = du1.isZero();// Display statusSystem.out.println("du1.isZero(): " + status);// checks whether the value// of this Duration (du2) is zero// or not i.e here it returns false because// the value of du2 is not 0status = du2.isZero();// Display statusSystem.out.println("du2.isZero(): " + status);// checks whether the value// of this Duration (du3) is zero// or not i.e here it returns true because// the value of du3 is 0status = du3.isZero();// Display statusSystem.out.println("du3.isZero(): " + status);} }Output
輸出量
du1: PT-10H du2: PT26H20M du3: PT0Sdu1.isZero(): false du2.isZero(): false du3.isZero(): true翻譯自: https://www.includehelp.com/java/duration-iszero-method-with-example.aspx
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