Java计算Date类时间差实例代码演示

import java.util.Date;

	public class DateDifferenceExample {    public static void main(String[] args) {
	        // 创建两个Date对象
	        Date date1 = new Date();
	        Date date2 = new Date(System.currentTimeMillis() + 100000);        // 获取每个Date对象的时间戳
	        long time1 = date1.getTime();
	        long time2 = date2.getTime();        // 计算两个时间戳之间的差值，以毫秒为单位
	        long diff = time2 - time1;        // 将毫秒转换为秒
	        long diffSeconds = diff / 1000;        // 将毫秒转换为分钟
	        long diffMinutes = diff / (60 * 1000);        // 将毫秒转换为小时
	        long diffHours = diff / (60 * 60 * 1000);        // 输出时间差
	        System.out.println("时间差（毫秒）：" + diff);
	        System.out.println("时间差（秒）：" + diffSeconds);
	        System.out.println("时间差（分钟）：" + diffMinutes);
	        System.out.println("时间差（小时）：" + diffHours);
	    }
	}

BigDecimal a= BigDecimal.valueOf(小时);
double waitTime = a.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();

long times = endTime -startTime;
double hours = (double) times/(60*60*1000);
BigDecimal a= BigDecimal.valueOf(hours);
double waitTime = a.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();