LocalDate类lengthOfMonth()方法 (LocalDate Class lengthOfMonth() method)

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

  lengthOfMonth()方法在java.time包中可用。

• lengthOfMonth() method is used to get the length of the month represented by this LocalDate. length of month = No. of days in a month [i.e. 1 to 31]

  lengthOfMonth()方法用于获取此LocalDate表示的月份的长度。 月的长度=一个月中的天数[即1到31]

• lengthOfMonth() 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.

  lengthOfMonth()方法是一个非静态方法，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。

• lengthOfMonth() method does not throw an exception at the time of returning length.

  lengthOfMonth()方法在返回length时不会引发异常。

Syntax:

句法：

public int lengthOfMonth();

Parameter(s):

参数：

• None

  没有

Return value:

返回值：

The return type of this method is int, it returns the length of month denoted by this object.

此方法的返回类型为int ，它返回此对象表示的月份的长度。

Example:

例：

// Java program to demonstrate the example // of int lengthOfMonth() method of LocalDateimport java.time.*;public class LengthOfMonthOfLocalDate {
       public static void main(String args[]) {
           // Instantiates three LocalDate        LocalDate l_da1 = LocalDate.parse("2007-04-04");        LocalDate l_da2 = LocalDate.now();        LocalDate l_da3 = LocalDate.of(2020, Month.FEBRUARY, 06);        // Display l_da1,l_da2 and l_da3        System.out.println("LocalDate l_da1,l_da2 and l_da3: ");        System.out.println("l_da1: " + l_da1);        System.out.println("l_da2: " + l_da2);        System.out.println("l_da3: " + l_da3);        System.out.println();        // Here, this method returns the        // length of month represented by         // this date l_da1 i.e. here         // l_da1 = "2007-04-04" then number        // of days in the month of april is        // 30 i.e. length = 30        int length = l_da1.lengthOfMonth();        // Display length        System.out.println("l_da1.lengthOfMonth(): " + length);        // Here, this method returns the         // length of month represented by        // this date l_da2 i.e. here        // l_da2 = "2020-05-08" then number        // of days in the month of may is        // 31 i.e. length = 31        length = l_da2.lengthOfMonth();        // Display length        System.out.println("l_da2.lengthOfMonth(): " + length);        // Here, this method returns the        // length of month represented by        // this date l_da3 i.e. here          // l_da3 = "2020-02-06" then number        // of days in the month of feb is        // either 28 or 29 based on year        // i.e. 2020 is a leap year so the        // number of days in feb is 29 i.e.        // length = 29        length = l_da3.lengthOfMonth();        // Display length        System.out.println("l_da3.lengthOfMonth(): " + length);    }}

Output

输出量

LocalDate l_da1,l_da2 and l_da3: l_da1: 2007-04-04l_da2: 2020-05-31l_da3: 2020-02-06l_da1.lengthOfMonth(): 30l_da2.lengthOfMonth(): 31l_da3.lengthOfMonth(): 29

翻译自: