collections

import java.io.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;

public class Main {
    public static void main(String[] args) {
        ArrayList<CallLog> callLogs = new ArrayList<>();

        try (BufferedReader br = new BufferedReader(new FileReader("weeklycall.csv"))) {
            String line;
            while ((line = br.readLine()) != null) {
                String[] parts = line.split(",");
                if (parts.length == 4) {
                    String name = parts[0];
                    String dialledNumber = parts[1];
                    int duration = Integer.parseInt(parts[2]);
                    Date dialledDate = new SimpleDateFormat("yyyy-MM-dd").parse(parts[3]);
                        callLogs.add(new CallLog(name, dialledNumber, duration, dialledDate));

                }
            }
        } catch (IOException | ParseException e) {
            e.printStackTrace();
        }
        Collections.sort(callLogs);
        Collections.reverse(callLogs);
        System.out.println("Call-Logs");
        System.out.println("Caller  Name  Duration");

        for (CallLog log : callLogs) {
            System.out.println(log);
        }
    }
}

//CallLog.java
import java.util.Date;

public class CallLog implements Comparable<CallLog> {
    private String name;
    private String dialledNumber;
    private int duration;
    private Date dialledDate;

    public CallLog(String name,String d,int du,Date di){
        this.name=name;
        this.dialledNumber=d;
        this.duration=du;
        this.dialledDate=di;
    }
    @Override
    public int compareTo(CallLog other) {
        return this.name.compareTo(other.name);
    }

    @Override
    public String toString() {
        return name + "(+91-"+this.dialledNumber+") " + duration + " Seconds";
    }
}