为Java中的Calendar类导入以下软件包。import java.util.Calendar;
首先，创建一个Calendar对象并显示当前日期和时间。Calendar calendar = Calendar.getInstance();
System.out.println("Current Date and Time = " + calendar.getTime());
现在，让我们使用calendar.add()方法和Calendar.MINUTE常数减少分钟数。设置负值，因为您要减少分钟数。calendar.add(Calendar.MINUTE, -15);
示例import java.util.Calendar;
public class Demo {
public static void main(String[] args) {
Calendar calendar = Calendar.getInstance();
System.out.println("Current Date = " + calendar.getTime());
//从当前日期减去15分钟
calendar.add(Calendar.MINUTE, -15);
System.out.println("Updated Date = " + calendar.getTime());
}
}
输出结果Current Date = Thu Nov 22 16:26:19 UTC 2018
Updated Date = Thu Nov 22 16:11:19 UTC 2018
