Java ChronoLocalDateTime with(TemporalAdjuster)用法及代码示例

ChronoLocalDateTime接口的with(TemporalAdjuster Adjuster)方法用于使用TemporalAdjuster调整此日期时间，调整后返回调整后的日期时间的副本。使用指定的调节器策略对象进行调节。该ChronoLocalDateTime实例是不可变的，不受此方法调用的影响。一个简单的调节器用于设置一个字段，例如Year字段，而更复杂的调节器可能将时间设置为一年的最后一天。

用法:

default ChronoLocalDateTime with(TemporalAdjuster adjuster)

参数：该方法接受调节器作为要使用的调节器的参数。

返回值：此方法根据所做的调整返回一个ChronoLocalDateTime。

异常：此方法引发以下异常：

DateTimeException–如果无法进行调整。
ArithmeticException–如果发生数字溢出。

以下示例程序旨在说明with()方法：

示例1:

// Java program to demonstrate 
// ChronoLocalDateTime.with() method 
  
import java.time.*; 
import java.time.chrono.*; 
import java.time.temporal.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create ChronoLocalDateTime object 
        ChronoLocalDateTime time 
            = LocalDateTime 
                  .parse("2019-12-31T19:15:30"); 
  
        // print instance 
        System.out.println("ChronoLocalDateTime before"
                           + " adjustment: "
                           + time); 
  
        // apply with method of ChronoLocalDateTime 
        ChronoLocalDateTime updatedlocal 
            = time.with(Month.OCTOBER) 
                  .with(TemporalAdjusters 
                            .firstDayOfMonth()); 
  
        // print instance 
        System.out.println("ChronoLocalDateTime after"
                           + " adjustment: "
                           + updatedlocal); 
    } 
}

输出：

ChronoLocalDateTime before adjustment: 2019-12-31T19:15:30
ChronoLocalDateTime after adjustment: 2019-10-01T19:15:30

示例2:

// Java program to demonstrate 
// ChronoLocalDateTime.with() method 
  
import java.time.*; 
import java.time.chrono.*; 
import java.time.temporal.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create ChronoLocalDateTime object 
        ChronoLocalDateTime time 
            = LocalDateTime 
                  .parse("2018-10-25T23:12:31.123"); 
  
        // print instance 
        System.out.println("ChronoLocalDateTime before"
                           + " adjustment: "
                           + time); 
  
        // apply with method of ChronoLocalDateTime 
        ChronoLocalDateTime updatedlocal 
            = time.with(Month.JANUARY) 
                  .with(TemporalAdjusters 
                            .firstDayOfMonth()); 
  
        // print instance 
        System.out.println("ChronoLocalDateTime after"
                           + " adjustment: "
                           + updatedlocal); 
    } 
}

输出：

ChronoLocalDateTime before adjustment: 2018-10-25T23:12:31.123
ChronoLocalDateTime after adjustment: 2018-01-01T23:12:31.123

参考： https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoLocalDateTime.html#with-java.time.temporal.TemporalAdjuster-

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注：本文由纯净天空筛选整理自srinam大神的英文原创作品 ChronoLocalDateTime with(TemporalAdjuster) method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。