Java MonthDay adjustInto()方法及示例

MonthDay 类的 adjustInto() 方法用于调整所传递的时间对象，使其具有此方法所适用的MonthYear。此实例是不可改变的，不受此方法调用的影响。

语法

public Temporal adjustInto(Temporal temporal)

参数： 该方法接受 temporal 作为参数，它是要调整的目标时间对象。它不应该是空的。

返回值： 该方法返回调整后的对象。

异常： 该方法会抛出以下异常。

• DateTimeException – 如果不能进行调整。
• ArithmeticException – 如果不能进行调整。

下面的程序说明了adjustInto()方法：

程序1 :

// Java program to demonstrate
// MonthDay.adjustInto() method
  
import java.time.*;
import java.time.temporal.*;
  
public class GFG {
    public static void main(String[] args)
    {
        // create a MonthDay object
        MonthDay mday = MonthDay.of(10, 31);
  
        // print instance
        System.out.println("MonthDay :"
                           + mday);
  
        // create a temporal object
        LocalDate date
 = LocalDate.parse("2007-12-03");
  
        // print instance
        System.out.println("LocalDate :"
                           + date);
  
        // apply adjustInto method of Year class
        LocalDate updatedlocal
 = (LocalDate)mday.adjustInto(date);
  
        // print instance
        System.out.println("LocalDate after"
                           + " applying adjustInto method: "
                           + updatedlocal);
    }
}

输出。

MonthDay :--10-31
LocalDate :2007-12-03
LocalDate after applying adjustInto method: 2007-10-31

程序2

// Java program to demonstrate
// MonthDay.adjustInto() method
  
import java.time.*;
import java.time.temporal.*;
  
public class GFG {
    public static void main(String[] args)
    {
        // create a MonthDay object
        MonthDay mday = MonthDay.of(12, 22);
  
        // print instance
        System.out.println("MonthDay :"
                           + mday);
  
        // create a temporal object
        LocalDate date
 = LocalDate.parse("2017-12-03");
  
        // print instance
        System.out.println("LocalDate :"
                           + date);
  
        // apply adjustInto method of Year class
        LocalDate updatedlocal 
= (LocalDate)mday.adjustInto(date);
  
        // print instance
        System.out.println("LocalDate after"
                           + " applying adjustInto method: "
                           + updatedlocal);
    }
}

输出。

MonthDay :--12-22
LocalDate :2017-12-03
LocalDate after applying adjustInto method: 2017-12-22

**参考资料: ** https://docs.oracle.com/javase/10/docs/api/java/time/MonthDay.html#adjustInto(java.time.temporal.Temporal)。