如何在java中实现间隔 java 相隔天数

仅为记录练习示例，或存在较多不足，欢迎指正，谢谢

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;

import org.junit.Test;

public class DateUtil {
	@Test
	public void dateCount() {
		
		SimpleDateFormat simDate = new SimpleDateFormat("yyyy-MM-dd");
		long day = 0l;
		System.out.println("请输入需要计算天数的起始时间，格式yyyy-MM-dd: ");
		Scanner sc = new Scanner(System.in);
		String dateBase = sc.next();
		Date dateNow = new Date();
		String formatDate = simDate.format(dateNow);
		try {
			day = (simDate.parse(formatDate).getTime() - simDate.parse(dateBase).getTime())/(24*60*60*1000);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		System.out.println(day);
	}
}