Java中的 TemporalAdjusters lastInMonth() 方法和示例

TemporalAdjusters 类的lastInMonth(DayOfWeek)方法用于返回一个 TemporalAdjuster 对象，该对象可用于获取一个新的 Date 对象，该对象是同一月的最后一个日期，具有与任何 Date 对象作为参数传递的相同匹配的 DayOfWeek应用此 TempotralAdjuster。

句法：

public static TemporalAdjuster lastInMonth(DayOfWeek dayOfWeek)

参数：此方法接受dayOfWeek可用于获取新的 Date 对象，该对象是具有相同匹配 DayOfWeek 的同一月的最后一个日期。

返回值：此方法返回月份调整器的最后一个，不为空。

下面的程序说明了 TemporalAdjusters.lastInMonth() 方法：
方案一：

// Java program to demonstrate
// TemporalAdjusters.lastInMonth()
  
import java.time.*;
import java.time.temporal.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // get TemporalAdjuster with
        // the last in month adjuster
        TemporalAdjuster temporalAdjuster
            = TemporalAdjusters.lastInMonth(
                DayOfWeek.SUNDAY);
  
        // using adjuster for local date-time
        LocalDate localDate
            = LocalDate.of(1998, 10, 31);
        LocalDate lastInMonth
            = localDate.with(temporalAdjuster);
  
        // print
        System.out.println(
            "last date in month having"
            + " sunday for localdate "
            + localDate + " is: "
            + lastInMonth);
    }
}

输出：

last date in month having sunday for localdate 1998-10-31 is: 1998-10-25

方案二：

// Java program to demonstrate
// TemporalAdjusters.lastInMonth() method
  
import java.time.*;
import java.time.temporal.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // get TemporalAdjuster with
        // the last in month adjuster
        TemporalAdjuster temporalAdjuster
            = TemporalAdjusters.lastInMonth(
                DayOfWeek.TUESDAY);
  
        // using adjuster for local date time
        LocalDate localDate
            = LocalDate.of(2029, 12, 11);
        LocalDate lastInMonth
            = localDate.with(temporalAdjuster);
  
        // print
        System.out.println(
            "The last date in a month "
            + "having TUESDAY for localdate "
            + localDate + " is: "
            + lastInMonth);
    }
}

输出：

The last date in a month having TUESDAY for localdate 2029-12-11 is: 2029-12-25

参考：https: Java Java.time.DayOfWeek)