Java中的 JapaneseDate toEpochDay() 方法与示例

Java.time.chrono.JapaneseDate类的toEpochDay()方法用于获取当前日本日期和 1970-01-01 之间存在的纪元天数。

句法：

public long toEpochDay()

参数：此方法不接受任何参数作为参数。

返回值：此方法返回当前 Hijrah 日期和 1389-10-22 之间存在的纪元天数。

下面是说明toEpochDay()方法的示例：

示例 1：

Java

// Java program to demonstrate
// toEpochDay() 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 no of ephoch days present
            // by using toEpochDay() method
            long length = hidate.toEpochDay();
  
            // Display the result
            System.out.println("EpochDay : "
                               + length);
        }
        catch (DateTimeException e) {
            System.out.println("passed parameter can"
                               + " not form a date");
            System.out.println("Exception thrown: "
                               + e);
        }
    }
}

输出：

EpochDay : 18365

示例 2：

Java

// Java program to demonstrate
// toEpochDay() 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(1970, 01, 01);
  
            // Getting no of ephoch days present
            // by using toEpochDay() method
            long length = hidate.toEpochDay();
  
            // Display the result
            System.out.println("EpochDay : "
                               + length);
        }
        catch (DateTimeException e) {
            System.out.println("passed parameter can"
                               + " not form a date");
            System.out.println("Exception thrown: "
                               + e);
        }
    }
}

输出：

EpochDay : 0

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