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Java LocalTime withNano()用法及代碼示例


LocalTime類的withNano()方法用於獲取此LocalTime的副本,並將nanos更改為傳遞給此方法的參數的nanos。此LocalTime的其餘值將保持不變。此實例是不可變的,不受此方法調用的影響。

用法:

public LocalTime withNano(int nano)

參數:此方法接受單個參數nano,該參數表示要在結果中設置的納秒(從0到999、999、999)。


返回值:此方法基於此時間返回帶有請求的nano的LocalTime實例。

異常:如果nano值無效,則此方法引發異常DateTimeException

以下示例程序旨在說明withNano()方法:

程序1:

// Java program to demonstrate 
// LocalTime.withNano() method 
  
import java.time.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a LocalTime object 
        LocalTime time 
            = LocalTime.parse("19:34:50.63"); 
  
        // print time 
        System.out.println("Old LocalTime: "
                           + time); 
  
        // Get a new LocalDateTime with nanos 100000 
        LocalTime newtime = time.withNano(100000); 
  
        // print result 
        System.out.println("New LocalDateTime: "
                           + newtime); 
    } 
}
輸出:
Old LocalTime: 19:34:50.630
New LocalDateTime: 19:34:50.000100

程序2:

// Java program to demonstrate 
// LocalTime.withNano() method 
  
import java.time.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a LocalTime object 
        LocalTime time 
            = LocalTime.parse("01:21:30.13"); 
  
        // print time 
        System.out.println("Old LocalTime: "
                           + time); 
  
        // Get a new LocalDateTime with nanos 999999 
        LocalTime newtime = time.withNano(999999); 
  
        // print result 
        System.out.println("New LocalDateTime: "
                           + newtime); 
    } 
}
輸出:
Old LocalTime: 01:21:30.130
New LocalDateTime: 01:21:30.000999999

參考文獻: https://docs.oracle.com/javase/10/docs/api/java/time/LocalTime.html#withNano(int)



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注:本文由純淨天空篩選整理自AmanSingh2210大神的英文原創作品 LocalTime withNano() method in Java with Examples。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。