Java中的LocalDateTime類的withHour()方法用於獲取此LocalDateTime的副本,並將小時數更改為作為此方法的參數傳遞的小時數。此LocalDateTime的其餘值保持不變。
用法:
public LocalDateTime withHour(int hours)
參數:此方法接受單個強製性參數hours,該參數指定要在結果LocalDateTime實例中設置的小時數。該小時數的範圍是0到23。
返回值:該函數返回LocalDateTime實例,並將小時數更改為作為此方法的參數傳遞的小時數。此LocalDateTime的其餘值保持不變。
異常:如果小時值無效,則該函數將引發DateTimeException。
以下示例程序旨在說明LocalDateTime.withHour()方法:
示例1:
// Program to illustrate the withHour() method
import java.util.*;
import java.time.*;
public class GfG {
public static void main(String[] args)
{
// Get the LocalDateTime instance
LocalDateTime dt = LocalDateTime.now();
// Get the String representation of this LocalDateTime
System.out.println("Original LocalDateTime: "
+ dt.toString());
// Get a new LocalDateTime with hours 0
System.out.println("New LocalDateTime: "
+ dt.withHour(0));
}
}
輸出:
Original LocalDateTime: 2018-11-30T12:53:06.591 New LocalDateTime: 2018-11-30T00:53:06.591
示例2:
// Program to illustrate the withHour() method
import java.util.*;
import java.time.*;
public class GfG {
public static void main(String[] args)
{
// Get the LocalDateTime instance
LocalDateTime dt
= LocalDateTime
.parse("2015-04-06T10:15:30");
// Get the String representation of this LocalDateTime
System.out.println("Original LocalDateTime: "
+ dt.toString());
// Get a new LocalDateTime with hours 20
System.out.println("New LocalDateTime: "
+ dt.withHour(20));
}
}
輸出:
Original LocalDateTime: 2015-04-06T10:15:30 New LocalDateTime: 2015-04-06T20:15:30
參考: https://docs.oracle.com/javase/10/docs/api/java/time/LocalDateTime.html#withHour(int)
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注:本文由純淨天空篩選整理自gopaldave大神的英文原創作品 LocalDateTime withHour() 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。