Fixed minor bugs

build.gradle

@@ -1,8 +1,14 @@
 import org.gradle.api.plugins.internal.DefaultJavaApplication
+import org.gradle.internal.jvm.Jvm
 
 plugins {
     id 'java'
     id 'application'
+    id 'checkstyle'
+}
+
+checkstyle {
+    toolVersion = '8.23'
 }
 
 group 'seedu.duke'
@@ -13,8 +19,7 @@ repositories {
 }
 
 final def application = application {
-    // Change this to your main class.
-    mainClassName = "Duke.class"
+    mainClassName = "Launcher"
 }
 application
 

data/tasks.txt

@@ -0,0 +1 @@
+D/dividefalse/dividethis/divide1997-08-08

src/main/java/Duke.java

@@ -9,8 +9,8 @@ public class Duke extends Application {
     private UserText tasks;
     private DukeParser parser;
 
-    public Duke(String filePath) throws DukeException {
-        DukeUI.showWelcomeMessage();
+    public Duke() {
+        String filePath = "data/tasks.txt";
         storage = new DukeStorage(filePath);
         tasks = storage.readText();
         parser = new DukeParser(this.tasks);
@@ -22,10 +22,6 @@ public void run() {
         storage.saveTasks(tasks);
     }
 
-    public static void main(String[] args) throws DukeException {
-        new Duke("data/tasks.txt").run();
-    }
-
     @Override
     public void start(Stage stage) {
         Label helloWorld = new Label("Hello World!"); // Creating a new Label control

src/main/java/Launcher.java

@@ -6,6 +6,8 @@
 public class Launcher {
     public static void main(String[] args) {
         Application.launch(Duke.class, args);
+        Duke duke = new Duke();
+        duke.run();
     }
 }
 

src/main/java/Task.java

@@ -36,7 +36,7 @@ public boolean isDone() {
     }
 
     public String getStatusIcon() {
-        return (isDone ? "\u2713" : "\u2718"); //return tick or X symbols
+        return (isDone ? "O" : "X"); //return tick or X symbols
     }
 
     public String getDescription() {