Java 中的 chronolocaldatimeadjustint()方法，示例

原文:https://www . geeksforgeeks . org/chronolocaldatetime-adjustint-method-in-Java-with-examples/

Java 中ChronalDatetime接口的adjustitinto()方法用于调整指定的时态对象，使其与该对象具有相同的日期。

语法 :

default Temporal adjustInto(Temporal temporal)

参数:该方法接受单个参数时间，该参数为需要调整的目标对象，不具体为空。

返回值:返回调整后的对象，不为空。

异常:函数抛出如下所述的两个异常:

  1. [datetimeexception] : thrown when the program cannot be adjusted.
  2. Arithmetic exception : If there is a numerical overflow, the program will throw this.

下面的程序说明了 Java 中的 ChronoLocalDateTime()方法:

程序 1 :

// Program to illustrate the adjustInto() method

import java.util.*;
import java.time.*;
import java.time.chrono.*;

public class GfG {
    public static void main(String[] args)
    {

        LocalDateTime date
            = LocalDateTime
                  .parse("2018-12-06T19:21:12");

        // prints the date
        System.out.println(date);

        // Parses the date
        ChronoLocalDateTime date1
            = LocalDateTime.now();

        // Uses the function to adjust the date
        date = (LocalDateTime)date1.adjustInto(date);

        // Prints the adjusted date
        System.out.println(date);
    }
}

输出:

2018-12-06T19:21:12
2019-05-14T09:39:37.953

节目 2 :举例说明异常。下面的程序抛出一个异常，因为 2 月是 28 天，而不是 31 天。

// Program to illustrate the adjustInto() method
// Exception Program

import java.util.*;
import java.time.*;
import java.time.chrono.*;

public class GfG {
    public static void main(String[] args)
    {
        try {

            LocalDateTime date
                = LocalDateTime
                      .parse("2018-12-06T19:21:12");

            // prints the date
            System.out.println(date);

            // Parses the date
            ChronoLocalDateTime date1
                = LocalDateTime.parse("2015-02-31");

            // Uses the function to adjust the date
            date = (LocalDateTime)date1.adjustInto(date);

            // Prints the adjusted date
            System.out.println(date);
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出:

2018-12-06T19:21:12
java.time.format.DateTimeParseException:
 Text '2015-02-31' could not be parsed at index 10

参考:https://docs . Oracle . com/javase/9/docs/API/Java/time/chrono/chronolocaldatetime . html # adjustInto-Java . time . temporal-

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