package c; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Scanner; public class wor {//三天打鱼两天晒网,1990-01-01 public static void main(String[] args) throws ParseException { int count=0; String s1="1990-01-01"; String s2; Scanner scan =new Scanner(System.in); System.out.println("请输入你的日期,格式为:xxxx-xx-xx:"); s2=scan.next(); //格式化 SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd"); Date d1=sdf.parse(s1); Date d2=sdf.parse(s2); long p=1+((d2.getTime()-d1.getTime())/(1000*60*60*24));//p是总天数 if(p%5==1||p%5==2||p%5==3){ System.out.println("打鱼"); } else if(p%5==4||p%5==0){ System.out.println("晒网"); } // Date d3=new Date(p);2022-08 // System.out.println(d3); } }