java中Date日期类型的大小比较

public int compareTo(Date anotherDate)

String date1="2020-10-23";
		String date2="2019-11-22";
		//转换格式
		SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
		//[1]调用compareTo()方法
		try {
			Date date3=sdf.parse(date1);
			Date date4=sdf.parse(date2);
			switch(date3.compareTo(date4)) {
			case 1:
				System.out.println("大于");
				break;
			case 0:
				System.out.println("相等");
				break;
			case -1:
				System.out.println("小于");
				break;
			}
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

public long getTime()

String date1="2020-10-23";
		String date2="2019-11-22";
		//转换格式
		SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
		try {
			Date date3=sdf.parse(date1);
			Date date4=sdf.parse(date2);
			
			long time1= date3.getTime();
			long time2=date4.getTime();
			System.out.println(time1+"\n"+time2);
			System.out.println(time1>time2);
			
			
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}