Java.util.Date.before() 方法 Java.util.Date.after() 方法 Java.util.Date.clone() 方法 Java.util.Date.before() 方法 package com.codingdict; import java.util.*; public class DateDemo { public static void main(String[] args) { // create 2 dates Date date = new Date(11, 5, 21); Date date2 = new Date(15, 1, 21); // tests if date 2 is before date and print boolean before = date2.before(date); System.out.println("Date 2 is before date: " + before); // tests if date is before date 2 and print before = date.before(date2); System.out.println("Date is before date 2: " + before); } } Java.util.Date.after() 方法 Java.util.Date.clone() 方法