Java中的 JapaneseDate lengthOfMonth() 方法及示例

Java.time.chrono.JapaneseDate类的lengthOfMonth()方法用于获取由特定日本日期表示的月份中存在的天数。

句法：

public int lengthOfMonth()

参数：此方法不接受任何参数作为参数。

返回值：此方法返回由特定日本日期表示的月份中存在的天数。

以下是说明lengthOfMonth()方法的示例：

示例 1：

Java

// Java program to demonstrate
// lengthOfMonth() method
  
import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;
import java.time.temporal.*;
  
public class GFG {
    public static void main(String[] argv)
    {
        try {
            // Creating and initializing
            // JapaneseDate Object
            JapaneseDate hidate
                = JapaneseDate.now();
  
            // Getting length of a month
            // by using lengthOfMonth() method
            int length = hidate.lengthOfMonth();
  
            // Display the result
            System.out.println("no of day present: "
                               + length);
        }
        catch (DateTimeException e) {
            System.out.println("passed parameter can"
                               + " not form a date");
            System.out.println("Exception thrown: "
                               + e);
        }
    }
}

输出：

no of day present: 31

示例 2：

Java

// Java program to demonstrate
// lengthOfMonth() method
  
import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;
import java.time.temporal.*;
  
public class GFG {
    public static void main(String[] argv)
    {
        try {
            // Creating and initializing
            // JapaneseDate Object
            JapaneseDate hidate
                = JapaneseDate.of(2020, 06, 23);
  
            // Getting length of a month
            // by using lengthOfMonth() method
            int length = hidate.lengthOfMonth();
  
            // Display the result
            System.out.println(
                "no of day present: "
                + length);
        }
        catch (DateTimeException e) {
            System.out.println("passed parameter can"
                               + " not form a date");
            System.out.println("Exception thrown: "
                               + e);
        }
    }
}

输出：

no of day present: 30

参考： https://docs.oracle.com/javase/9/docs/api/ Java/time/chrono/JapaneseDate.html#lengthOfMonth–