Update MainApp.java

Author: rohan2266

src/sortvisualiser/MainApp.java

@@ -7,36 +7,35 @@
 import javax.swing.SwingUtilities;
 
 public class MainApp {
-    private final JFrame window;
+    private final JFrame window;/*JFrame is a class of the javax.swing package. It provides GUI interface
+                                 Frame works like the main window where components like labels, buttons, textfields are added to create a GUI.*/
+    public static final int WIN_WIDTH = 1280; // Assigning width of main frame window
+    public static final int WIN_HEIGHT = 720; //Assigning height of main frame window
 
-    public static final int WIN_WIDTH = 1280;
-    public static final int WIN_HEIGHT = 720;
-
-    private final ArrayList<Screen> screens;
+    private final ArrayList<Screen> screens; // created a arraylist of type Screen
 
     public MainApp() {
-        screens = new ArrayList<>();
-        window = new JFrame ("Sort visualiser");
-        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
-        window.setVisible(true);
+        screens = new ArrayList<>();  // Initialising a new arraylist of screens
+        window = new JFrame ("Sort visualiser"); // Heading of GUI window
+        window.setVisible(true); // For making the GUI visible or not
     }
 
-    public Screen getCurrentScreen() {
+    public Screen getCurrentScreen() { //returns current screen
         return screens.get(screens.size() - 1);
     }
 
-    public void pushScreen(Screen screen) {
-        if (!screens.isEmpty()) {
+    public void pushScreen(Screen screen) {   //initialised a method to push screen that takes object of Screen class as parameter
+        if (!screens.isEmpty()) {             // if screen is not empty then remove the current screen from GUI
             window.remove(getCurrentScreen());
         }
-        screens.add(screen);
-        window.setContentPane(screen);
-        window.validate();
+        screens.add(screen);                   // If screen is empty, add a new screen to GUi
+        window.setContentPane(screen);         // Set the content pane through the screen object
+        window.validate();                     //Inbuilt function
         screen.onOpen();
     }
 
-    public void popScreen() {
-        if (!screens.isEmpty()) {
+    public void popScreen() {               //initiated a method to pop the window and screen on GUI
+        if (!screens.isEmpty()) {           // if screen is not empty then remove the window and screen
             Screen prev = getCurrentScreen();
             screens.remove(prev);
             window.remove(prev);
@@ -52,15 +51,14 @@ public void popScreen() {
         }
     }
 
-    public void start() {
+    public void start() {      // starts and push the main menu screen onto the GUI
         pushScreen(new MainMenuScreen(this));
         window.pack();
     }
 
-    public static void main(String... args) {
-        System.setProperty("sun.java2d.opengl", "true");
+    public static void main(String[] args) {
         SwingUtilities.invokeLater(() -> {
             new MainApp().start();
         });
     }
-}
+}