Update Main.java

src/Main.java

@@ -1,10 +1,19 @@
-import javax.swing.*;
+// Edited by JunRong for Assignment 2
+import javax.swing.*; // Import Swing library for GUI components
 
 public class Main {
     public static void main(String[] args) {
+
+        // Create a new window from the AppGUI class
         AppGUI window = new AppGUI();
+
+        // Adjust window size to fit components
         window.pack();
+
+        // Display the window on the screen
         window.setVisible(true);
+
+        // Close program when window is closed
         window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     }
 }