Java SimpleDateFormat hashCode()方法及示例

SimpleDateFormat类 的 hashCode() 方法用于返回该SimpleDateFormat对象的哈希代码值。哈希代码是整数类型的。

语法

public int hashCode()

参数： 该方法不接受任何参数。

返回值： 该方法返回该SimpleDateFormat对象的哈希代码值，为整数类型。

下面的程序说明了SimpleDateFormat的hashCode()方法的工作。

例1 :

// Java to illustrate hashCode() method
  
import java.text.*;
import java.util.*;
  
public class SimpleDateFormat_Demo {
    public static void main(String[] args)
        throws InterruptedException
    {
        // Initializing SimpleDateFormat
        SimpleDateFormat SDFormat
            = new SimpleDateFormat(
                "dd/MM/yyyy");
  
        // Displaying the formats
        Date date = new Date();
        String str_Date1 = SDFormat.format(date);
        System.out.println("The Original: "
                           + (str_Date1));
  
        // Displaying the hash code
        System.out.println("The hash code: "
                           + SDFormat.hashCode());
    }
}

输出:

The Original: 30/01/2019
The hash code: -650712384

例2 :

// Java to illustrate hashCode() method
  
import java.text.*;
import java.util.*;
  
public class SimpleDateFormat_Demo {
    public static void main(String[] args)
        throws InterruptedException
    {
        // Initializing SimpleDateFormat
        SimpleDateFormat SDFormat
            = new SimpleDateFormat(
                "MM/dd/yyyy");
  
        // Displaying the formats
        Date date = new Date();
        String str_Date1 = SDFormat.format(date);
        System.out.println("The Original: "
                           + (str_Date1));
  
        // Displaying the hash code
        System.out.println("The hash code: "
                           + SDFormat.hashCode());
    }
}

输出:

The Original: 01/30/2019
The hash code: 2087096576