Java中的 TemporalAdjusters firstDayOfNextYear() 方法及示例

TemporalAdjusters 类的firstDayOfNextYear()方法用于返回“明年的第一天”TemporalAdjuster 对象，该对象返回一个设置为下一年第一天的新 Date 对象。

句法：

public static TemporalAdjuster firstDayOfNextYear()

参数：此方法不接受任何内容。

返回值：该方法返回明年第一天的调整器，不为空。

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

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

输出：

First day of next year for localdate 2020-05-11: 2021-01-01

方案二：

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

输出：

First day of next year for localdate :2010-12-29: 2011-01-01

参考资料：https: Java