d

DemoProjects/src/game/minitennis1/Game.java

@@ -0,0 +1,12 @@
+package game.minitennis1;
+import javax.swing.JFrame;
+
+public class Game {
+    public static void main(String[] args) {
+        JFrame frame = new JFrame("Mini Tennis");
+        frame.setSize(300, 300);
+        frame.setVisible(true);
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        frame.setLocationRelativeTo(null);
+    }
+}