Add javadocs and align code towards the coding standards

build.gradle

@@ -41,6 +41,9 @@ test {
         showStandardStreams = false
     }
 }
+run {
+    enableAssertions = true
+}
 
 application {
     mainClass.set("duke.Launcher")

src/main/java/duke/Duke.java

@@ -12,6 +12,11 @@
 
 public class Duke{
     TaskList tasks = Storage.loadTasks("src/data/Duke.txt");
+
+    /**
+     * Initiates interaction with the Duke application.
+     * This method prompts the user and parses their input.
+     */
     public void dukeInteraction() {
         Ui.printHello();
         Scanner scanner = new Scanner(System.in);

src/main/java/duke/Launcher.java

@@ -1,4 +1,5 @@
 package duke;
+
 import javafx.application.Application;
 
 public class Launcher {

src/main/java/duke/Main.java

@@ -1,6 +1,7 @@
 package duke;
 
 import duke.ui.MainWindow;
+
 import javafx.application.Application;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.Scene;
@@ -15,6 +16,10 @@ public class Main extends Application {
 
     private Duke duke = new Duke();
 
+    /**
+     * Initializes and starts the JavaFX application.
+     * @param stage The primary stage for this application, representing the main window.
+     */
     @Override
     public void start(Stage stage) {
         assert duke != null;

src/main/java/duke/Parser.java

@@ -42,7 +42,7 @@ private static void updateList(String str, TaskList tasks) throws InvalidInputEx
                 for (int i = 0; i < tasks.getSize(); i++) {
                     tasks.markDone(i);
                 }
-                temp = Ui.printAllDone();
+                temp = Ui.printAllDone(tasks);
             }
             else {
                 String num = str.substring(5);
@@ -60,7 +60,7 @@ private static void updateList(String str, TaskList tasks) throws InvalidInputEx
                 for (int i = 0; i < tasks.getSize(); i++) {
                     tasks.markNotDone(i);
                 }
-                temp = Ui.printAllNotDone();
+                temp = Ui.printAllNotDone(tasks);
             } else {
                 String num = str.substring(7);
                 int number = Integer.valueOf(num);
@@ -112,6 +112,12 @@ else if (str.equals("list")) {
             temp = Ui.listTasks(tasks);
         }
     }
+    /**
+     * Adds the tasks of type ToDo into tasklist based on the input string.
+     * @param str   The input string.
+     * @param tasks The TaskList to process tasks.
+     * @throws ToDoCommandUseException
+     */
     private static void addToDo(String str, TaskList tasks) throws ToDoCommandUseException {
         String todo = str.substring(4);
         //remove any leading and trailing whitespace characters and
@@ -125,6 +131,12 @@ private static void addToDo(String str, TaskList tasks) throws ToDoCommandUseExc
         tasks.addTask(task);
         temp = Ui.printAddTask(task, tasks);
     }
+    /**
+     * Adds the tasks of type Deadline into tasklist based on the input string.
+     * @param str   The input string.
+     * @param tasks The TaskList to process tasks.
+     * @throws DeadlineCommandUseException
+     */
     private static void addDeadline(String str, TaskList tasks) throws DeadlineCommandUseException {
         DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HHmm");
         if (!str.contains("/by ")) {
@@ -143,6 +155,12 @@ private static void addDeadline(String str, TaskList tasks) throws DeadlineComma
             temp = Ui.printAddTask(task, tasks);
         }
     }
+    /**
+     * Adds the tasks of type Event into tasklist based on the input string.
+     * @param str   The input string.
+     * @param tasks The TaskList to process tasks.
+     * @throws EventCommandUseException
+     */
     private static void addEvent(String str, TaskList tasks) throws EventCommandUseException {
         DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HHmm");
         if (!str.contains("/from")) {
@@ -205,18 +223,22 @@ public static String chat(String str, TaskList tasks) {
                 return Ui.printBye();
             }
             else if (str.equals("help")) {
+                Storage.saveTasks("src/data/Duke.txt", tasks);
                 return Ui.printHelp();
             }
             else if (str.startsWith("mark ") || str.startsWith("unmark ")
                     || str.startsWith("delete ")) {
                 updateList(str, tasks);
+                Storage.saveTasks("src/data/Duke.txt", tasks);
             }
             else if (str.startsWith("todo") || str.startsWith("deadline")
                     || str.startsWith("event")) {
                 addTasks(str, tasks);
+                Storage.saveTasks("src/data/Duke.txt", tasks);
             }
             else if (str.equals("list") || str.startsWith("find ")) {
                 returnList(str, tasks);
+                Storage.saveTasks("src/data/Duke.txt", tasks);
             } else {
                 throw new InvalidInputException(str);
             }

src/main/java/duke/Storage.java

@@ -7,12 +7,14 @@
 
 import java.io.BufferedReader;
 import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.io.FileWriter;
 import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+
 import java.nio.file.Files;
 import java.nio.file.FileSystems;
 import java.nio.file.Path;
+
 import java.time.LocalDateTime;
 
 /**

src/main/java/duke/TaskList.java

@@ -9,7 +9,7 @@
  * It provides methods for adding, removing, and retrieving tasks from the list.
  */
 public class TaskList{
-    private List<Task> tasks = new ArrayList<>();
+    private final List<Task> tasks = new ArrayList<>();
     /**
      * Default constructor to initialize an empty TaskList.
      */

src/main/java/duke/task/Event.java

@@ -1,7 +1,7 @@
 package duke.task;
 
-import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
+import java.time.LocalDateTime;
 
 /**
  * This class inherits from the Task class and represents an Event task type

src/main/java/duke/ui/DialogBox.java

@@ -1,6 +1,4 @@
 package duke.ui;
-import java.io.IOException;
-import java.util.Collections;
 
 import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
@@ -13,6 +11,9 @@
 import javafx.scene.image.ImageView;
 import javafx.scene.layout.HBox;
 
+import java.io.IOException;
+import java.util.Collections;
+
 /**
  * An example of a custom control using FXML.
  * This control represents a dialog box consisting of an ImageView to represent the speaker's face and a label
@@ -24,6 +25,12 @@ public class DialogBox extends HBox {
     @FXML
     private ImageView displayPicture;
 
+    /**
+     * Constructs a new DialogBox instance with the specified text and image.
+     *
+     * @param text The text to be displayed in the dialog.
+     * @param img The image to be displayed alongside the text in the dialog.
+     */
     private DialogBox(String text, Image img) {
         try {
             FXMLLoader fxmlLoader = new FXMLLoader(MainWindow.class.getResource("/view/DialogBox.fxml"));
@@ -48,10 +55,24 @@ private void flip() {
         setAlignment(Pos.TOP_LEFT);
     }
 
+    /**
+     * Creates and returns a DialogBox instance representing a user's dialog message.
+     *
+     * @param text The text of the user's message to be displayed in the dialog.
+     * @param img The image to be displayed alongside the user's message in the dialog.
+     * @return A DialogBox instance representing the user's message with the specified text and image.
+     */
     public static DialogBox getUserDialog(String text, Image img) {
         return new DialogBox(text, img);
     }
 
+    /**
+     * Creates and returns a new DialogBox instance representing Duke's dialog.
+     *
+     * @param text The text to be displayed in Duke's dialog.
+     * @param img The image to be displayed alongside the text in Duke's dialog.
+     * @return A new DialogBox instance representing Duke's dialog.
+     */
     public static DialogBox getDukeDialog(String text, Image img) {
         var db = new DialogBox(text, img);
         db.flip();

src/main/java/duke/ui/MainWindow.java

@@ -25,6 +25,10 @@ public class MainWindow extends AnchorPane {
     private Image userImage = new Image(this.getClass().getResourceAsStream("/images/Muggle.png"));
     private Image dukeImage = new Image(this.getClass().getResourceAsStream("/images/Duke.png"));
 
+    /**
+     * Initializes the JavaFX controller when the associated FXML file is loaded.
+     * This method sets up the scroll pane and adds the initial Duke's dialog to the dialog container.
+     */
     @FXML
     public void initialize() {
         scrollPane.vvalueProperty().bind(dialogContainer.heightProperty());