java Java 中的 GregorianCalendar hashCode()方法

Java 中的 GregorianCalendar hashCode()方法

原文:https://www . geesforgeks . org/gregoriancalendar-hashcode-method-in-Java/

java . util . GregorianCalendar . hashcode()是 Java 中的内置函数，它为这个 GregorianCalendar 实例生成哈希代码。

语法:

public int hashCode()

参数:此功能不接受任何参数。

返回值:该函数返回一个整数值，该整数值代表这个格雷戈里安卡列达尔实例的哈希代码。

示例:

Input : Thu Jul 24 00:53:29 UTC 1997
Output : 2121703905

Input : Tue Jul 24 00:54:11 UTC 2018
Output : -909136554

下面的程序说明了 Java . util . gregoriancalendar . hashcode()函数: 程序 1:

// Java Program to illustrate hashCode() function
// of GregorianCalendar class

import java.io.*;
import java.util.*;

class GFG {
     public static void main(String[] args) {

      // Create a new calendar
      GregorianCalendar c = (GregorianCalendar) 
                GregorianCalendar.getInstance();

      // Display the current date and time
      System.out.println("Current Date and Time : "
                                    + c.getTime());

      // Display hashcode for this calendar
      System.out.println("Hash Code:" + c.hashCode());
   }
}

Output:

Current Date and Time : Fri Jul 27 11:43:16 UTC 2018
Hash Code:-612105832

程序 2:

// Java Program to illustrate hashCode() function
// of GregorianCalendar class

import java.io.*;
import java.util.*;

class GFG {
     public static void main(String[] args) {

      // Create a new calendar
      GregorianCalendar c = (GregorianCalendar) 
                 GregorianCalendar.getInstance();

      // Display the current date and time
      System.out.println("Current Date and Time : "
                                     + c.getTime());

      c.add((GregorianCalendar.YEAR), -12);
      System.out.println("Modified Date and Time : "
                                    + c.getTime());

      // Display hashcode for this calendar
      System.out.println("Hash Code of the " + 
      "modified date and time:" + c.hashCode());
   }
}

Output:

Current Date and Time : Fri Jul 27 11:43:18 UTC 2018
Modified Date and Time : Thu Jul 27 11:43:18 UTC 2006
Hash Code of the modified date and time:-1346149059