Java中的 JapaneseDate hashCode() 方法与示例

Java.time.chrono.JapaneseDate类的hashCode()方法用于获取特定日本日期的哈希码。

句法：

public int hashCode()

参数：此方法不接受任何参数作为参数。

返回值：此方法返回特定日本日期的哈希码。

以下是说明hashCode()方法的示例：

示例 1：

// Java program to demonstrate
// hashCode() 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 hash code of the date
            // by using hashCode() method
            long tempo = hidate.hashCode();
  
            // display the result
            System.out.println("hashcode : "
                               + tempo);
        }
        catch (DateTimeException e) {
            System.out.println("passed parameter can"
                               + " not form a date");
            System.out.println("Exception thrown: "
                               + e);
        }
    }
}

输出：

hashcode : -691830052

示例 2：

// Java program to demonstrate
// hashCode() 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(2003, 06, 13);
  
            // getting hash code of the date
            // by using hashCode() method
            long tempo = hidate.hashCode();
  
            // display the result
            System.out.println("hashcode : "
                               + tempo);
        }
        catch (DateTimeException e) {
            System.out.println("passed parameter can"
                               + " not form a date");
            System.out.println("Exception thrown: "
                               + e);
        }
    }
}

输出：

hashcode : -691914148

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