Java Calendar hashCode()用法及代碼示例

Calendar類中的hashCode()方法用於返回此Calendar對象的哈希碼。

用法:

public int hashCode()

參數：該方法不包含任何參數。

返回值：該方法返回此日曆對象的哈希碼值。

以下示例程序旨在說明Calendar類的hashCode()方法的用法：
示例1:

// Java code to illustrate 
// hashCode() method 
  
import java.util.*; 
  
public class Calendar_Demo { 
    public static void main(String args[]) 
    { 
        // Creating a calendar object 
        Calendar calndr = Calendar.getInstance(); 
  
        // Displaying the current calendar 
        System.out.println("The time on"
                           + " Calendar shows: "
                           + calndr.getTime()); 
  
        // Getting the hash code 
        int hash_code = calndr.hashCode(); 
        System.out.println("The hash code "
                           + "for this calendar is: "
                           + hash_code); 
    } 
}

輸出：

The time on Calendar shows: Wed Feb 20 15:55:22 UTC 2019
The hash code for this calendar is: 194416203

示例2:

// Java code to illustrate 
// hashCode() method 
  
import java.util.*; 
  
public class Calendar_Demo { 
    public static void main(String args[]) 
    { 
        // Creating a calendar 
        Calendar calndr 
            = new GregorianCalendar(2018, 6, 10); 
  
        // Displaying the current calendar 
        System.out.println("The time on"
                           + " Calendar shows: "
                           + calndr.getTime()); 
  
        // Getting the hash code 
        int hash_code = calndr.hashCode(); 
        System.out.println("The hash code "
                           + "for this calendar is: "
                           + hash_code); 
    } 
}

輸出：

The time on Calendar shows: Tue Jul 10 00:00:00 UTC 2018
The hash code for this calendar is: -2123101761

參考： https://docs.oracle.com/javase/8/docs/api/java/util/Calendar.html#hashCode–

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注：本文由純淨天空篩選整理自Chinmoy Lenka大神的英文原創作品 Calendar hashCode() Method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。