Java 中的计时周期减法()方法，示例
原文:https://www . geesforgeks . org/chronoperiod-减法器-Java-in-method-with-examples/
java.time.chrono 包中计时周期接口的减法从(时态)方法用于将该计时周期减去指定的时态对象，作为参数传递。
语法:
Temporal subtractFrom(Temporal temporalObject)
参数:该方法接受一个参数时间对象，即该时间周期内需要调整的量。它不应为空。
返回值:该方法返回一个相同类型的对象，并对其进行时间对象调整。
异常:此方法抛出:
- Abnormal date and time : If the subtraction is not possible.
- Arithmetic exception : If there is a numerical overflow.
以下示例说明了 ChronoPeriod .减法 From()方法:
程序 1 :
// Java code to show the function subtractFrom()
// to subtract the two given periods
import java.time.*;
import java.time.chrono.*;
import java.time.temporal.ChronoUnit;
public class ChronoPeriodDemo {
// Driver Code
public static void main(String[] args)
{
// Defining period
int year = 4;
int months = 11;
int days = 10;
ChronoPeriod p1 = Period.of(year, months, days);
// Get the time to be adjusted
LocalDateTime currentTime
= LocalDateTime.now();
// Adjust the time
// using subtractFrom() method
System.out.println(
p1.subtractFrom(currentTime));
}
}
输出:
2014-07-07T14:22:21.929
程序二 :
// Java code to show the function subtractFrom()
// to subtract the two given periods
import java.time.*;
import java.time.chrono.*;
import java.time.temporal.ChronoUnit;
public class ChronoPeriodDemo {
// Driver Code
public static void main(String[] args)
{
// Defining period
int year1 = 2;
int months1 = 7;
int days1 = 8;
ChronoPeriod p1 = Period.of(year1, months1, days1);
// Get the time to be adjusted
LocalDateTime currentTime
= LocalDateTime.now();
// Adjust the time
// using subtractFrom() method
System.out.println(
p1.subtractFrom(currentTime));
}
}
输出:
2016-11-09T14:22:26.600
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