Java 中的 SimpleDateFormat hashCode()方法,带示例
原文:https://www . geesforgeks . org/simpledateform-hashcode-method-in-Java-with-examples/
SimpleDateFormat 类的 hashCode() 方法用于返回这个 SimpleDateFormat 对象的哈希码值。哈希代码是整数类型。
语法:
public int hashCode()
参数:该方法不取任何参数。
返回值:该方法返回这个 SimpleDateFormat 对象的哈希码值,并且是整数类型。
下面的程序说明了简单日期格式的 hashCode()方法的工作原理:
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());
}
}
Output:
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());
}
}
Output:
The Original: 01/30/2019
The hash code: 2087096576
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