Java TemporalAdjusters lastDayOfMonth()用法及代碼示例

TemporalAdjusters類的lastDayOfMonth()方法用於返回“每月的最後一天” TemporalAdjuster對象，該對象返回設置為該月最後一天的新Date對象。

用法:

public static TemporalAdjuster lastDayOfMonth()

參數：此方法不接受任何內容。

返回值：此方法返回月份的最後一天調節器，而不是null。

以下示例程序旨在說明TemporalAdjusters.lastDayOfMonth()方法：
程序1:

// Java program to demonstrate 
// TemporalAdjusters.lastDayOfMonth() 
  
import java.time.LocalDate; 
import java.time.temporal.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // get TemporalAdjuster with last day 
        // of the month adjuster 
        TemporalAdjuster temporalAdjuster 
            = TemporalAdjusters.lastDayOfMonth(); 
  
        // using adjuster for local date-time 
        LocalDate localDate 
            = LocalDate.of(2020, 05, 11); 
        LocalDate lastDayOfMonth 
            = localDate.with(temporalAdjuster); 
  
        // print 
        System.out.println("last day of the "
                           + "month for localdate "
                           + localDate + ":"
                           + lastDayOfMonth); 
    } 
}

輸出：

last day of the month for localdate 2020-05-11:2020-05-31

程序2:

// Java program to demonstrate 
// TemporalAdjusters.lastDayOfMonth() method 
  
import java.time.LocalDate; 
import java.time.temporal.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // get TemporalAdjuster with last day 
        // of the month adjuster 
        TemporalAdjuster temporalAdjuster 
            = TemporalAdjusters 
                  .lastDayOfMonth(); 
  
        // using adjuster for local date-time 
        LocalDate localDate 
            = LocalDate.of(2010, 12, 29); 
        LocalDate lastDayOfMonth 
            = localDate.with(temporalAdjuster); 
  
        // print 
        System.out.println("last day of the "
                           + "month for localdate "
                           + localDate + ":"
                           + lastDayOfMonth); 
    } 
}

輸出：

last day of the month for localdate 2010-12-29:2010-12-31

參考文獻：https://docs.oracle.com/javase/10/docs/api/java/time/format/TemporalAdjusters.html

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