Level-4

src/main/java/Duke.java

@@ -1,10 +1,10 @@
 import java.util.Scanner;
 
-class tasks {
+class Task {
     private String taskDescription;
     private boolean isDone;
 
-    public tasks(String taskDescription) {
+    public Task(String taskDescription) {
         this.taskDescription = taskDescription;
         this.isDone = false;
     }
@@ -22,31 +22,98 @@ public String toString() {
     }
 }
 
+class Todo extends Task {
+    public Todo(String description) {
+        super(description);
+    }
+
+    @Override
+    public String toString() {
+        return "[T]" + super.toString();
+    }
+}
+
+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 + ")";
+    }
+}
+
+class Event extends Task {
+    protected String from;
+    protected String to;
+
+    public Event(String description, String from, String to) {
+        super(description);
+        this.from = from;
+        this.to = to;
+    }
+
+    @Override
+    public String toString() {
+        return "[E]" + super.toString() + " (from: " + from + " to: " + to + ")";
+    }
+}
+
 public class Duke {
     public static void main(String[] args) {
         Scanner scanner = new Scanner(System.in);
-        tasks[] task = new tasks[100];
-        int Count = 0;
+        Task[] task = new Task[100];
+        int count = 0;
 
         System.out.println("Hello! I'm Bentley\n" + "What can I do for you?\n");
 
-        while (Count < 100) {
+        while (count < 100) {
             String userInput = scanner.nextLine();
 
             if (userInput.equals("Bye")) {
                 System.out.println("Bye. Hope to see you again soon!");
                 break;
             } else if (userInput.equals("List")) {
 
-                for (int i = 0; i < Count; i++) {
+                for (int i = 0; i < count; i++) {
                     System.out.println((i + 1) + ". " + task[i]);
                 }
+
+            } else if (userInput.startsWith("todo")) {
+                task[count] = new Todo(userInput.substring(5));
+                System.out.println("Got it. I've added this task:");
+                System.out.println("  " + task[count]);
+                System.out.println("Now you have " + (count + 1) + " tasks in the list.");
+                count++;
+            }
+
+            else if (userInput.startsWith("deadline")) {
+                String[] parts = userInput.substring(9).split("/by");
+                task[count] = new Deadline(parts[0].trim(), parts[1].trim());
+                System.out.println("Got it. I've added this task:");
+                System.out.println("  " + task[count]);
+                System.out.println("Now you have " + (count + 1) + " tasks in the list.");
+                count++;
+
+            } else if (userInput.startsWith("event")) {
+                String[] parts = userInput.substring(6).split("/from");
+                String[] eventParts = parts[1].trim().split("/to");
+                task[count] = new Event(parts[0].trim(), eventParts[0].trim(), eventParts[1].trim());
+                System.out.println("Got it. I've added this task:");
+                System.out.println("  " + task[count]);
+                System.out.println("Now you have " + (count + 1) + " tasks in the list.");
+                count++;
+
             } else if (userInput.startsWith("mark")) {
                 System.out.println(" Nice! I've marked this task as done:");
                 int taskNumber = Integer.parseInt(userInput.split(" ")[1]);
                 task[taskNumber - 1].markAsDone();
 
-                for (int i = 0; i < Count; i++) {
+                for (int i = 0; i < count; i++) {
                     System.out.println((i + 1) + ". " + task[i]);
                 }
 
@@ -55,14 +122,14 @@ public static void main(String[] args) {
                 int taskNumber = Integer.parseInt(userInput.split(" ")[1]);
                 task[taskNumber - 1].markAsUndone();
 
-                for (int i = 0; i < Count; i++) {
+                for (int i = 0; i < count; i++) {
                     System.out.println((i + 1) + ". " + task[i]);
                 }
 
             } else {
-                task[Count] = new tasks(userInput);
-                System.out.println("added: " + task[Count]);
-                Count++;
+                task[count] = new Task(userInput);
+                System.out.println("added: " + task[count]);
+                count++;
             }
         }