java 根据类名示例化类_Java LocalDateTime类| minusMonths（）方法与示例

java 根据类名示例化类

LocalDateTime类minusMonths()方法 (LocalDateTime Class minusMonths() method)

• minusMonths() method is available in java.time package.

  minusMonths()方法在java.time包中可用。

• minusMonths() method is used to subtract the given months from this date-time object and return the LocalDateTime.

  minusMonths()方法用于从此日期时间对象中减去给定的月份，并返回LocalDateTime。

• minusMonths() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  minusMonths()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• minusMonths() method may throw an exception at the time of performing subtraction.

  minusMonths()方法在执行减法时可能会引发异常。

  DateTimeException – This exception may throw when the calculated result value exceeds the limit.

  DateTimeException –当计算结果值超出限制时，可能引发此异常。

Syntax:

句法：

public LocalDateTime minusMonths(long mon_val);

Parameter(s):

参数：

• long mon_val – represents the months to be subtracted from this LocalDateTime.

  long mon_val –表示要从此LocalDateTime中减去的月份。

Return value:

返回值：

The return type of this method is LocalDateTime, it returns the LocalDateTime that holds the value subtracted the given months from this LocalDateTime.

此方法的返回类型为LocalDateTime ，它返回LocalDateTime，该值保存从该LocalDateTime中减去给定月份的值。

Example:

例：

// Java program to demonstrate the example
// of minusMonths(long mon_val) method
// of LocalDateTime
import java.time.*;
public class minusMonthsOfLocalDateTime {
public static void main(String args[]) {
long months = 4;
// Instantiates two LocalDateTime
LocalDateTime da_ti1 = LocalDateTime.parse("2005-10-05T10:10:10.00");
LocalDateTime da_ti2 = LocalDateTime.now();
// Display da_ti1, da_ti2 and
// months
System.out.println("LocalDateTime da_ti1 and da_ti2: ");
System.out.println("da_ti1: " + da_ti1);
System.out.println("da_ti2: " + da_ti2);
System.out.println("months to subtract: " + months);
System.out.println();
// Here, this method subtracts the given
// months from this date-time object i.e.
// here we are subracting 4 months from
// this object da_ti1
LocalDateTime minus_mon = da_ti1.minusMonths(months);
// Display minus_mon
System.out.print("da_ti1.minusMonths(months): ");
System.out.println(minus_mon);
// Here, this method subtracts the given months
// from this date-time object i.e. here we are
// subracting 4 months from this object
// da_ti2
minus_mon = da_ti2.minusMonths(months);
// Display minus_mon
System.out.print("da_ti2.minusMonths(months): ");
System.out.println(minus_mon);
}
}

Output

输出量

LocalDateTime da_ti1 and da_ti2:
da_ti1: 2005-10-05T10:10:10
da_ti2: 2020-06-07T16:18:57.328164
months to subtract: 4
da_ti1.minusMonths(months): 2005-06-05T10:10:10
da_ti2.minusMonths(months): 2020-02-07T16:18:57.328164

翻译自: https://www.includehelp.com/java/localdatetime-minusmonths-method-with-example.aspx

java 根据类名示例化类