Add error handling

Add error handling for two specific cases
rgonslayer · Aug 24, 2022 · 6ba56ba · 6ba56ba
1 parent 1f2120d
commit 6ba56ba
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Showing 3 changed files with 88 additions and 71 deletions.
diff --git a/src/main/java/Jarvis.java b/src/main/java/Jarvis.java
@@ -3,91 +3,98 @@
 import java.util.ArrayList;
 
 public class Jarvis {
-    public static void main(String[] args) {
+    public static void main(String[] args) throws JarvisException {
         Scanner inputScanner = new Scanner(System.in);
 
         String userInput;
         String introduction = "Hello! I'm Jarvis \n"
-                            + "What can I do for you?";
+                + "What can I do for you?";
         String farewell = "Bye. Hope to see you again soon!";
 
         List<Task> taskList = new ArrayList<>();
 
         System.out.println(introduction);
+        try {
+            while (true) {
+                //receive user input
+                userInput = inputScanner.nextLine();
+                //check if userinput is bye, break if true
+                if (userInput.equals("bye")) {
+                    break;
+                }
+                //if userinput equals list, return task list
+                if (userInput.equals("list")) {
+                    System.out.println("Here are the tasks in your list:\n");
+                    for (int i = 0; i < taskList.size(); i++) {
+                        if (taskList.get(i) == null) {
+                            break;
+                        }
+                        System.out.println((i + 1) + ". " + taskList.get(i).toString());
+                    }
+                    continue;
+                }
+                //if userinput equals mark, check which task and mark it
+                if (userInput.length() > 4 && userInput.substring(0, 4).equals("mark")) {
+                    int toMark = Integer.parseInt(userInput.substring(5)) - 1;
+                    taskList.get(toMark).mark();
+                    String markResponse = "Nice! I've marked this task as done:\n ";
+                    System.out.println(markResponse + taskList.get(toMark).toString());
+                    continue;
+                }
+                //if userinput equals unmark, check which task and unmark
+                if (userInput.length() > 6 && userInput.substring(0, 6).equals("unmark")) {
+                    int toMark = Integer.parseInt(userInput.substring(7)) - 1;
+                    taskList.get(toMark).unmark();
+                    String markResponse = "Ok, I've marked this task as not done yet:\n ";
+                    System.out.println(markResponse + taskList.get(toMark).toString());
+                    continue;
+                }
+                //if userinput equals delete, check which task and delete
+                if (userInput.length() > 6 && userInput.substring(0, 6).equals("delete")) {
+                    int toDelete = Integer.parseInt(userInput.substring(7)) - 1;
+                    Task deleteTask = taskList.get(toDelete);
+                    taskList.remove(toDelete);
+                    String deleteResponse = "Noted. I've removed this task:\n ";
+                    System.out.println(deleteResponse + deleteTask.toString());
+                    continue;
+                }
 
-        while (true) {
-            //receive user input
-            userInput = inputScanner.nextLine();
-            //check if userinput is bye, break if true
-            if (userInput.equals("bye")) {
-                break;
-            }
-            //if userinput equals list, return task list
-            if (userInput.equals("list")) {
-                System.out.println("Here are the tasks in your list:\n");
-                for (int i = 0; i < taskList.size(); i ++) {
-                    if (taskList.get(i) == null) {
-                        break;
+                //if userinput equals to do add new to do task to list
+                if (userInput.length() > 3 && userInput.substring(0, 4).equals("todo")) {
+                    String description = userInput.substring(4);
+                    if (description.equals("")) {
+                        throw new JarvisException("The description of a todo cannot be empty");
                     }
-                    System.out.println((i + 1) + ". " + taskList.get(i).toString());
+                    taskList.add(new ToDo(description));
+                    System.out.println("Got it. I've added this task:\n " + taskList.get(Task.count - 1)
+                            + "\nNow you have " + (Task.count) + " tasks in the list.");
                 }
-                continue;
-            }
-            //if userinput equals mark, check which task and mark it
-            if (userInput.length() > 4 && userInput.substring(0, 4).equals("mark")) {
-                int toMark = Integer.parseInt(userInput.substring(5)) - 1;
-                taskList.get(toMark).mark();
-                String markResponse = "Nice! I've marked this task as done:\n ";
-                System.out.println(markResponse + taskList.get(toMark).toString());
-                continue;
-            }
-            //if userinput equals unmark, check which task and unmark
-            if (userInput.length() > 6 && userInput.substring(0, 6).equals("unmark")) {
-                int toMark = Integer.parseInt(userInput.substring(7)) - 1;
-                taskList.get(toMark).unmark();
-                String markResponse = "Ok, I've marked this task as not done yet:\n ";
-                System.out.println(markResponse + taskList.get(toMark).toString());
-                continue;
-            }
-            //if userinput equals delete, check which task and delete
-            if (userInput.length() > 6 && userInput.substring(0, 6).equals("delete")) {
-                int toDelete = Integer.parseInt(userInput.substring(7)) - 1;
-                Task deleteTask = taskList.get(toDelete);
-                taskList.remove(toDelete);
-                String deleteResponse = "Noted. I've removed this task:\n ";
-                System.out.println(deleteResponse + deleteTask.toString());
-                continue;
-            }
 
-            //if userinput equals to do add new to do task to list
-            if (userInput.length() > 4 && userInput.substring(0, 4).equals("todo")) {
-                taskList.add(new ToDo(userInput));
-                System.out.println("Got it. I've added this task:\n " + taskList.get(Task.count - 1)
-                        + "\nNow you have " + (Task.count) + " tasks in the list.");
+                //if userinput equals deadline add new deadline task to list
+                if (userInput.length() > 8 && userInput.substring(0, 8).equals("deadline")) {
+                    int divisor = userInput.indexOf("/by");
+                    String description = userInput.substring(9, divisor - 1);
+                    String date = userInput.substring(divisor + 4);
+                    taskList.add(new Deadline(description, date));
+                    System.out.println("Got it. I've added this task:\n " + taskList.get(Task.count - 1)
+                            + "\nNow you have " + (Task.count) + " tasks in the list.");
+                }
+                //if userinput equals event add new event task to list
+                if (userInput.length() > 7 && userInput.substring(0, 5).equals("event")) {
+                    int divisor = userInput.indexOf("/at");
+                    String description = userInput.substring(6, divisor - 1);
+                    String date = userInput.substring(divisor + 4);
+                    taskList.add(new Event(description, date));
+                    System.out.println("Got it. I've added this task:\n " + taskList.get(Task.count - 1)
+                            + "\nNow you have " + (Task.count) + " tasks in the list.");
+                }
+                throw new JarvisException("I'm sorry, but I don't know what that means");
             }
 
-            //if userinput equals deadline add new deadline task to list
-            if (userInput.length() > 8 && userInput.substring(0, 8).equals("deadline")) {
-                int divisor = userInput.indexOf("/by");
-                String description = userInput.substring(9, divisor - 1);
-                String date = userInput.substring(divisor + 4);
-                taskList.add(new Deadline(description, date));
-                System.out.println("Got it. I've added this task:\n " + taskList.get(Task.count - 1)
-                        + "\nNow you have " + (Task.count) + " tasks in the list.");
-            }
-            //if userinput equals event add new event task to list
-            if (userInput.length() > 7 && userInput.substring(0,5).equals("event")) {
-                int divisor = userInput.indexOf("/at");
-                String description = userInput.substring(6, divisor - 1);
-                String date = userInput.substring(divisor + 4);
-                taskList.add(new Event(description, date));
-                System.out.println("Got it. I've added this task:\n " + taskList.get(Task.count - 1)
-                        + "\nNow you have " + (Task.count) + " tasks in the list.");
-            }
+            System.out.println(farewell);
+        }
+        catch (JarvisException e) {
+            System.out.println((e.toString()));
         }
-
-        System.out.println(farewell);
-
-
     }
 }
diff --git a/src/main/java/JarvisException.java b/src/main/java/JarvisException.java
@@ -1,2 +1,10 @@
-public class JarvisException {
+public class JarvisException extends Exception{
+    public JarvisException(String errorMessage) {
+        super(errorMessage);
+    }
+
+    @Override
+    public String toString() {
+        return "OOPS!!! " + super.getMessage();
+    }
 }
diff --git a/src/main/java/TaskList.java b/src/main/java/TaskList.java
@@ -0,0 +1,2 @@
+public class TaskList {
+}