102 Java advance practice set

 package com.company;

import java.util.*;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Date;

public class CWH_102_Ps {
    public static void main(String[] args) {

//        Problem 1
        ArrayList<String> name = new ArrayList<>();
        name.add("Rohan");
        name.add("Prantika");
        name.add("Sunil");
        name.add("Sunita");
        name.add("Rupal");
        name.add("Roma");
        name.add("Saurav");
        name.add("Priyanka");
        name.add("Ram");
        name.add("Rima");
        for (String e:name)
        {
            System.out.println(e);
        }

//       Problem 2

        Date date= new Date();
        System.out.println(date);
        System.out.println(date.getHours() +":"+date.getMinutes()+":" +date.getSeconds());

//        Problem 3

        Calendar c= Calendar.getInstance();
        System.out.println(c.get(Calendar.HOUR_OF_DAY)+":"+c.get(Calendar.MINUTE)+":"+ c.get(Calendar.SECOND));

//        Problem 4

      LocalDateTime d= LocalDateTime.now();
//        System.out.println(d);
        DateTimeFormatter dt= DateTimeFormatter.ofPattern("H:m:s");
        String d1= d.format(dt);
        System.out.println(d1);

//        Problem 5
        HashSet<Integer> i= new HashSet<>();
        i.add(4);
        i.add(4);
        i.add(44);
        i.add(14);
        i.add(41);
        System.out.println(i.size());
        System.out.println(i);
    }
}