java 比较时间的几种方法

public class Test {
    public static void main(String[] args) {
        Date date1 = new Date();
        Date date2 = new Date(date1.getTime() + 1000);

        System.out.println(date1.before(date2));
        System.out.println(date1.compareTo(date2) == -1);
        System.out.println(date1.getTime() < date2.getTime());
    }
}