fix hardcode file path issue with Jar

src/main/java/duke/Duke.java

@@ -1,6 +1,7 @@
 package duke;
 import duke.exceptions.*;
 
+import java.io.File;
 import java.util.Scanner;
 import java.io.FileNotFoundException;
 import java.io.IOException;
@@ -25,15 +26,17 @@ public class Duke {
      *
      * @param filePath the location of the storage file.
      */
-    public Duke(String filePath){
+    public Duke(String filePath) throws IOException, StorageFileException {
         ui = new Ui();
         storage = new Storage(filePath);
-        try {
-            taskList = new TaskList(storage.loadFile());
-            numOfTask = taskList.getNumOfTask();
-        } catch (FileNotFoundException e) {
+        File f = new File(filePath);
+        if(f.createNewFile()){
             ui.showCreatingFileMessage();
             storage.createFile(filePath);
+            taskList = new TaskList();
+        }else{
+            taskList = new TaskList(storage.loadFile());
+            numOfTask = taskList.getNumOfTask();
         }
         ui.showWelcomeMessage(taskList);
     }
@@ -147,7 +150,13 @@ public void run(){
         }
     }
     public static void main(String[] args){
-        new Duke(filePath).run();
+        try {
+            new Duke(filePath).run();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        } catch (StorageFileException e) {
+            throw new RuntimeException(e);
+        }
     }
 }
 

src/main/java/duke/exceptions/StorageFileException.java

@@ -0,0 +1,4 @@
+package duke.exceptions;
+
+public class StorageFileException extends Exception{
+}

src/main/java/duke/storage/Storage.java

@@ -4,6 +4,7 @@
 import duke.Event;
 import duke.ToDo;
 import duke.exceptions.EventException;
+import duke.exceptions.StorageFileException;
 import duke.exceptions.ToDoException;
 import duke.Task;
 
@@ -42,13 +43,13 @@ public Storage(String userFilePath){
      *
      * @throws FileNotFoundException if the file cannot be located or does not exist.
      */
-    public ArrayList<Task> loadFile () throws FileNotFoundException {
+    public ArrayList<Task> loadFile () throws StorageFileException {
         numOfTask = 0;
         Scanner sc = null;
         try {
             sc = new Scanner(path);
         } catch (IOException e) {
-            throw new RuntimeException(e);
+            return null;
         }
         while (sc.hasNext()) {
             String task = sc.nextLine();
@@ -83,7 +84,6 @@ public ArrayList<Task> loadFile () throws FileNotFoundException {
                     }
                 default:
             }
-            System.out.println(task);
         }
         return tasksList;
     }
@@ -97,10 +97,8 @@ public ArrayList<Task> loadFile () throws FileNotFoundException {
     public void createFile(String filePath){
         try{
             File f = new File(filePath);
-            if(f.createNewFile()){
+            if(f.createNewFile()) {
                 System.out.println("Your file has been created: " + f.getName());
-            } else {
-                System.out.println("Your file already exists");
             }
         } catch(IOException e) {
             System.out.println("Error Occurred");

src/main/java/duke/tasklist/TaskList.java

@@ -23,6 +23,11 @@ public TaskList(ArrayList<Task> tasksList){
         numOfTask = tasks.size();
     }
 
+    public TaskList(){
+        tasks = new ArrayList<>();
+        numOfTask = tasks.size();
+    }
+
     /**
      * Prints out the tasks in the task list provided by the user.
      */