I've tried many things and CodeGym doesn't explain how to do this.
package com.codegym.task.task08.task0816;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.*;
/*
Kind Emma and the summer holidays
*/
public class Solution {
public static HashMap<String, Date> createMap() throws ParseException {
DateFormat df = new SimpleDateFormat("MMMMM d yyyy", Locale.ENGLISH);
HashMap<String, Date> map = new HashMap<String, Date>();
map.put("Stallone", df.parse("JUNE 1 1980"));
map.put("milligram", df.parse("AUGUST 1 1980"));
map.put("3", df.parse("JULY 3 1980"));
map.put("F", df.parse("NOVEMBER 1 1940"));
map.put("WQERWRne", df.parse("MARCH 1 1980"));
map.put("SASDFSDF", df.parse("DECEMBER 1 1980"));
map.put("StSDFDne", df.parse("SEPTEMBER 1 1980"));
map.put("StASDFAS", df.parse("OCTOBER 1 1980"));
map.put("StaFFFne", df.parse("APRIL 1 1980"));
map.put("SQQWEQne", df.parse("MAY 1 1980"));
return map;
}
public static void removeAllSummerPeople(HashMap<String, Date> map) {
Calendar c = Calendar.getInstance();
for (Map.Entry<String, Date> pair : map.entrySet()) {
Date thisDate = pair.getValue();
c.setTime(thisDate);
if (c.get(Calendar.MONTH) == 5 || c.get(Calendar.MONTH) == 6|| c.get(Calendar.MONTH) == 7) {
map.remove(pair.getValue());
map.remove(pair.getKey());
}
}
}
public static void main(String[] args) throws Exception {
HashMap<String, Date> map = createMap();
removeAllSummerPeople(map);
for (Map.Entry<String, Date> pair : map.entrySet()) {
System.out.println(pair.getKey() + " " + pair.getValue());
}
}
}