Week 5 [Sep 9] - Tasks

Submit weekly exercises
Implement increment Level-4

1 Submit weekly exercises

As usual.

2 Implement increment Level-4

Level-4: ToDo, Event, Deadline

Level 4. ToDos, Events, Deadlines

Add support for tracking three types of tasks:

ToDos: tasks without any date/time attached to it e.g., visit new theme park
Deadlines: tasks that need to be done before a specific date/time e.g., submit report by 11/10/2019 5pm
Events: tasks that start at a specific time and ends at a specific time e.g., team project meeting on 2/10/2019 2-4pm

Example:

todo borrow book
    ____________________________________________________________
     Got it. I've added this task: 
       [T][✗] borrow book
     Now you have 5 tasks in the list.
    ____________________________________________________________

list
    ____________________________________________________________
     Here are the tasks in your list:
     1.[T][✓] read book
     2.[D][✗] return book (by: June 6th)
     3.[E][✗] project meeting (at: Aug 6th 2-4pm)
     4.[T][✓] join sports club
     5.[T][✗] borrow book
    ____________________________________________________________

deadline return book /by Sunday
    ____________________________________________________________
     Got it. I've added this task: 
       [D][✗] return book (by: Sunday)
     Now you have 6 tasks in the list.
    ____________________________________________________________

event project meeting /at Mon 2-4pm
    ____________________________________________________________
     Got it. I've added this task: 
       [E][✗] project meeting (at: Mon 2-4pm)
     Now you have 7 tasks in the list.
    ____________________________________________________________

At this point, dates/times can be treated as strings; there is no need to convert them to actual dates/times.

Example:


deadline do homework /by no idea :-p
    ____________________________________________________________
     Got it. I've added this task: 
       [D][✗] do homework (by: no idea :-p)
     Now you have 6 tasks in the list.
    ____________________________________________________________

When implementing this feature, you are also recommended to implement the following extension as collections classes (e.g., ArrayList) have methods to easily delete an item at a specified location:

A-Inheritance

↳ Use Inheritance to support multiple task types

As there are multiple types of tasks that have some similarity between them, you can implement classes Todo, Deadline and Event classes to inherit from a Task class.

Furthermore, use polymorphism to store all tasks in a data structure containing Task objects e.g., Task[100].

public class Deadline extends Task {

    protected String by;

    public Deadline(String description, String by) {
        super(description);
        this.by = by;
    }

    @Override
    public String toString() {
        return "[D]" + super.toString() + " (by: " + by + ")";
    }
}

Task[] tasks = new Task[100];
task[0] = new Deadline("return book", "Monday");