使用Java日历的after()方法比较日期时间
Calendar.after()方法返回此Calendar的时间是否晚于指定Object表示的时间。
首先，让我们设置一个在当前日期（未来日期）之后的日期
Calendar afterDate = Calendar.getInstance(); afterDate.set(Calendar.YEAR, 2025); afterDate.set(Calendar.MONTH, 05); afterDate.set(Calendar.DATE, 30);
这是我们的约会时间，2018年11月22日
Calendar currentDate = Calendar.getInstance();
现在，使用after()方法比较两个日期，如以下示例所示
示例
import java.util.Calendar;
public class Demo {
public static void main(String[] args) {
Calendar afterDate = Calendar.getInstance();
afterDate.set(Calendar.YEAR, 2025);
afterDate.set(Calendar.MONTH, 05);
afterDate.set(Calendar.DATE, 30);
java.util.Date dt = afterDate.getTime();
System.out.println("Future Date = "+dt);
Calendar currentDate = Calendar.getInstance();
System.out.println("Current date = " + (currentDate.get(Calendar.MONTH) + 1) + "-"
+ currentDate.get(Calendar.DATE) + "-" + currentDate.get(Calendar.YEAR));
System.out.println("Date "+dt+ " is after current date? = " + afterDate.after(currentDate));
}
}输出结果
Future Date = Mon Jun 30 12:36:27 UTC 2025 Current date = 11-22-2018 Date Mon Jun 30 12:36:27 UTC 2025 is after current date? = true