The number of days difference between the two dates is calculated

Core code:

• set Calendar class () method
• The method of Calendar class getTimeInMillis
• Ms converted number of days: time/(1000*60*60*24)

package com.lenovo.text;
import java.util.Calendar;
public class LeapYear2 {
    public static void main(String[] args) {
        Calendar calendar1 = Calendar.getInstance();    //创建calendar1对象
        calendar1.set(2000, 1 - 1,1);                   //设置日期
        Calendar calendar2 = Calendar.getInstance();    
        calendar2.set(2016, 5 - 1 , 1);                 
        long time1 = calendar1.getTimeInMillis();  //将calendar1转换为毫秒
        long time2 = calendar2.getTimeInMillis();  
        long day=(time2-time1)/(1000*60*60*24);     //将相差的毫秒转换为天数
        System.out.println(day+"天");               
    }
}