Added StockTradingGameApp.java class

src/main/java/View/StockTradingGameApp.java

@@ -0,0 +1,49 @@
+package View;
+
+import javafx.application.Application;
+import javafx.stage.Stage;
+import Controller.StockFileHandler;
+import Model.*;
+
+import java.math.BigDecimal;
+
+public class StockTradingGameApp extends Application {
+    private Stage primaryStage;
+    private Exchange exchange;
+    private Player player;
+    private StockFileHandler fileHandler;
+
+    @Override
+    public void start(Stage primaryStage) {
+        this.primaryStage = primaryStage;
+        this.fileHandler = new StockFileHandler();
+
+        primaryStage.setTitle("Stock Trading Game");
+        primaryStage.setWidth(1200);
+        primaryStage.setHeight(800);
+
+        showGameSetup();
+        primaryStage.show();
+    }
+
+    private void showGameSetup() {
+        GameSetupScene setupScene = new GameSetupScene(this::startGame);
+        primaryStage.setScene(setupScene.getScene());
+    }
+
+    private void startGame(GameSetupScene.StartGameData gameData) {
+        this.exchange = gameData.exchange;
+        this.player = new Player(gameData.playerName, gameData.startingCapital);
+
+        MainGameScene gameScene = new MainGameScene(exchange, player, this::endGame);
+        primaryStage.setScene(gameScene.getScene());
+    }
+
+    private void endGame() {
+        primaryStage.close();
+    }
+
+    public static void main(String[] args) {
+        launch(args);
+    }
+}