Java IsoChronology dateNow(ZoneId)用法及代碼示例

java.time.chrono.IsoChronology類的dateNow()方法用於根據Iso日曆係統從指定時區中的係統時鍾獲取當前本地日期。

用法:

public LocalDate dateNow(ZoneId zone)

參數：此方法將區域ID的對象作為參數。

返回值：此方法根據Iso日曆係統從指定的時鍾對象返回本地日期。

下麵是說明dateNow()方法的示例：

範例1：

// Java program to demonstrate 
// dateNow() method 
  
import java.util.*; 
import java.io.*; 
import java.time.*; 
import java.time.chrono.*; 
  
public class GFG { 
    public static void main(String[] argv) 
    { 
        try { 
            // creating and initializing LocalDate Object 
            LocalDate hidate = LocalDate.now(); 
  
            // getting IsoChronology used in LocalDate 
            IsoChronology crono = hidate.getChronology(); 
  
            // creating and initializing ZoneId object 
            ZoneId id = ZoneId.systemDefault(); 
  
            // getting LocalDate for the 
            // given zoneid object 
            // by using dateNow() method 
            LocalDate date = crono.dateNow(id); 
  
            // display the result 
            System.out.println("LocalDate is:"
                               + date); 
        } 
        catch (DateTimeException e) { 
            System.out.println("passed parameter can"
                               + " not form a date"); 
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

輸出：

LocalDate is:2020-03-08

範例2：

// Java program to demonstrate 
// dateNow() method 
  
import java.util.*; 
import java.io.*; 
import java.time.*; 
import java.time.chrono.*; 
  
public class GFG { 
    public static void main(String[] argv) 
    { 
        try { 
            // creating and initializing LocalDate Object 
            LocalDate hidate = LocalDate.now(); 
  
            // getting IsoChronology used in LocalDate 
            IsoChronology crono = hidate.getChronology(); 
  
            // creating and initializing ZoneId object 
            ZoneId id = ZoneId.of("Europe/Paris"); 
  
            // getting LocalDate for the 
            // given zoneid object 
            // by using dateNow() method 
            LocalDate date = crono.dateNow(id); 
  
            // display the result 
            System.out.println("LocalDate is:"
                               + date); 
        } 
        catch (DateTimeException e) { 
            System.out.println("passed parameter can"
                               + " not form a date"); 
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

輸出：

LocalDate is:2020-03-08

參考： https://docs.oracle.com/javase/9/docs/api/java/time/chrono/IsoChronology.html#dateNow-java.time.ZoneId-

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注：本文由純淨天空篩選整理自RohitPrasad3大神的英文原創作品 IsoChronology dateNow(ZoneId) method in Java with Example。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。