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📜  带有示例的Java中的 ChronoLocalDateTime with(TemporalField, long) 方法

📅  最后修改于: 2022-05-13 01:55:01.969000             🧑  作者: Mango

带有示例的Java中的 ChronoLocalDateTime with(TemporalField, long) 方法

ChronoLocalDateTime接口的with(TemporalField field, long newValue)方法用于将 ChronoLocalDateTime 的指定字段设置为新值,并返回新时间的副本。此方法可用于更改任何支持的字段,例如年、日、月、小时、分钟或秒。如果由于不支持该字段或由于某些其他原因而无法设置新值,则会引发异常。这个 ChronoLocalDateTime 实例是不可变的,不受此方法调用的影响。

句法:

ChronoLocalDateTime with(TemporalField field, long newValue)

参数:此方法接受作为结果中要设置的字段的字段和结果中字段的新值作为参数的newValue

返回值:此方法基于此返回一个 ChronoLocalDateTime,并带有指定的字段集。

异常:此方法抛出以下异常:

  • DateTimeException – 如果无法进行调整。
  • UnsupportedTemporalTypeException – 如果不支持该字段。
  • ArithmeticException – 如果发生数字溢出。

下面的程序说明了 with() 方法:

方案一:

// 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(ChronoField.YEAR, 2017);
  
        // print instance
        System.out.println("ChronoLocalDateTime after"
                           + " adjustment: "
                           + updatedlocal);
    }
}
输出:
ChronoLocalDateTime before adjustment: 2019-12-31T19:15:30
ChronoLocalDateTime after adjustment: 2017-12-31T19:15:30

方案二:

// 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(ChronoField.MONTH_OF_YEAR, 1);
  
        // print instance
        System.out.println("ChronoLocalDateTime after"
                           + " adjustment: "
                           + updatedlocal);
    }
}
输出:
ChronoLocalDateTime before adjustment: 2018-10-25T23:12:31.123
ChronoLocalDateTime after adjustment: 2018-01-25T23:12:31.123

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