Changed Level-6 to use Arraylist

Author: DaDevChia

src/main/java/Duke.java

@@ -41,34 +41,6 @@ public static void main(String[] args) {
                     userInput = userScan.nextLine();  
                 }
 
-                //Add delete keyword and function
-                else if(Check.isDelete(userInput)){
-                    //get the task number
-                    int taskNumber = Integer.parseInt(userInput.substring(7));
-                    //if the task number is greater than the task count throw an exception
-                    if(taskNumber>taskCount){
-                        throw new IllegalArgumentException("The task number is greater than the number of tasks.");
-                    }
-                    //if the task number is less than 1 throw an exception
-                    if(taskNumber<1){
-                        throw new IllegalArgumentException("The task number is less than 1.");
-                    }
-                    //if there is no task at the task number throw an exception
-                    if(tasks.get(taskNumber-1)==null){
-                        throw new IllegalArgumentException("There is no task at the task number.");
-                    }
-                    //delete the task
-                    tasks.remove(taskNumber-1);
-                    //decrement the task count
-                    taskCount--;
-                    //print out the task that was deleted
-                    System.out.println("Noted. I've removed this task:");
-                    System.out.println(tasks.get(taskNumber-1));
-                    System.out.println("Now you have " + taskCount + " tasks in the list.");
-                    //Get user input again
-                    userInput = userScan.nextLine();  
-                }
-
                 //Add delete keyword and function
                 else if(Check.isDelete(userInput)){
                     //get the task number
@@ -87,12 +59,10 @@ else if(Check.isDelete(userInput)){
                     }
                     //delete the task
                     tasks.remove(taskNumber-1);
-                    //decrement the task count
-                    taskCount--;
                     //print out the task that was deleted
                     System.out.println("Noted. I've removed this task:");
                     System.out.println(tasks.get(taskNumber-1));
-                    System.out.println("Now you have " + taskCount + " tasks in the list.");
+                    System.out.println("Now you have " + tasks.size() + " tasks in the list.");
                     //Get user input again
                     userInput = userScan.nextLine();  
                 }