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📜  Java8 Period类

📅  最后修改于: 2020-10-01 06:38:12             🧑  作者: Mango

Java Period类

Java Period类用于以年，月和日为单位来度量时间。它继承了Object类并实现了ChronoPeriod接口。

Java Period类声明

让我们来看一下java.time.Period类的声明。

public final class Period extends Object implements ChronoPeriod, Serializable

Java时期的方法

Method Description
Temporal addTo(Temporal temporal) It is used to add this period to the specified temporal object.
long get(TemporalUnit unit) It is used to get the value of the requested unit.
int getYears() It is used to get the amount of years of this period.
boolean isZero() It is used to check if all three units of this period are zero.
Period minus(TemporalAmount amountToSubtract) It is used to return a copy of this period with the specified period subtracted.
static Period of(int years, int months, int days) It is used to obtain a Period representing a number of years, months and days.
Period plus(TemporalAmount amountToAdd) It is used to return a copy of this period with the specified period added.

Java Period示例：addTo()

import java.time.*;
import java.time.temporal.Temporal;
public class PeriodExample1 {
  public static void main(String[] args) {
    Period period = Period.ofDays(24);
    Temporal temp = period.addTo(LocalDate.now());
    System.out.println(temp);
  }
}

输出：

2017-02-24

Java时期示例：of()

import java.time.Period;
public class PeriodExample2 {
public static void main(String[] args) {
  Period period = Period.of(2017,02,16);
  System.out.println(period.toString());
}
}

输出：

P2017Y2M16D

Java Period示例：minus()

import java.time.Period;
public class PeriodExample3 {
  public static void main(String[] args) {
    Period period1 = Period.ofMonths(4); 
    Period period2 = period1.minus(Period.ofMonths(2));
    System.out.println(period2);
  }
}

输出：

P2M

Java Period示例：plus()

import java.time.Period;
public class PeriodExample4 {
  public static void main(String[] args) {
    Period period1 = Period.ofMonths(4); 
    Period period2 = period1.plus(Period.ofMonths(2));
    System.out.println(period2);
  }
}

输出：

P6M