java - 使用java的两个时间之间的时间差

Question

我正在尝试获取两个时间值之间的时间差。 (11:00:00 和 12:43:00)对于上述输入，它显示正确的输出。

**

Time in seconds: 6180 seconds.
Time in minutes: 103 minutes.
Time in hours: 1 hours.
Time in hours Round : 2 hours.

**对于输入值(“11:00:00”和“2:43:00”)，它应该为我们提供 3小时作为舍入值**

Time in seconds: -29820 seconds.
Time in minutes: -497 minutes.
Time in hours: -8 hours.
Time in hours Round : -8 hours.

**

import java.lang.Math; 
import java.text.SimpleDateFormat;
import java.util.Date;


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


String dateStart = "11:00:00";
String dateStop = "12:43:00";
// Custom date format
SimpleDateFormat format = new SimpleDateFormat("HH:mm:ss");  
Date d1 = null;
Date d2 = null;
try {
    d1 = format.parse(dateStart);
    d2 = format.parse(dateStop);
} catch (Exception e) {
    e.printStackTrace();
}    

// Get msec from each, and subtract.
long diff = d2.getTime() - d1.getTime();
long diffSeconds = diff / 1000;         
long diffMinutes = diff / (60 * 1000);         
long diffHours = diff / (60 * 60 * 1000);              
int parkingEntry=2;
int firstHour=3;
int parkingRate=4;
int Total=0;

System.out.println("Time in seconds: " + diffSeconds + " seconds.");         
System.out.println("Time in minutes: " + diffMinutes + " minutes.");         
System.out.println("Time in hours: " + diffHours + " hours."); 

double my_hrs=diffMinutes/60d;
     int r = (int) Math.round(my_hrs);
System.out.println("Time in hours Round : " + r + " hours."); 


  }
}

Answer 1

格式“HH:mm:ss”是 24 小时格式。因此，当您检查“11:00:00”和“2:43:00”之间的时差时，您实际上是在检查上午 11 点和凌晨 2:43 之间的时差。

将您的输入更改为“11:00:00”和“14:43:00”。