How many balls are bouncing game

Tell us your comments about Bouncing Balls II. Submit comment failed, please try again Submit. You may also like: Bouncing Letters Form words with the letter balls and destroy them all! Bouncing Balls Shoot the color balls to destroy them all! The constructor sets up the UI components, game objects, and starts the ball bouncing by invoking gameStart. It accepts two argument, width and height , which is used to set the dimension of the the drawing canvas, via callback method getPreferredSize in the DrawCanvas.

I also included the codes for handling window resize in componentResized callback handler, which shall resize the box to fill the window. Custom drawing is carried out in a DrawCanvas , which is derived from JPanel , by overriding the paintComponent Graphics method to program custom rendering. DrawCanvas is designed to be an inner class of the main class, so as to access the private variables of outer class - in particular, the game objects.

The gameStart start the game loop in a separate thread. The game loop repetitively a detect collision in the coming time-step and compute the proper responses, a synchronously update the position and state of all the game objects, c render graphics and refresh the display, d delay to control the refresh timing and yield control to other threads. The game loop is running in its own thread GameThread , by sub-classing Thread and overriding the run method to program the running behavior.

Multithread is necessary for game programming, as the graphics subsystem uses a so-called Event Dispatch Thread EDT to monitor the input events such as key-press, mouse-click , run the event handlers, and refreshes the display. If the Event Dispatch Thread is starved e. Method run is not supposed to be called directly, but called-back via the Thread 's method start.

The static method Thread. The sleep serves two purposes: It provides the necessary delay to achieve the target update or refresh rate, and also yields control to other threads to do their assigned tasks, in particular, the GUI Event Dispatch Thread which refreshes the screen and processes the inputs.

The game loop, in this case, is straight-forward. For each step, it moves the ball and checks if collision occurs.

If so, it computes the proper response. It refreshes the display by invoking repaint , which calls-back paintComponent of the DrawCanvas to carry out the custom drawing. The Main class provides the main method to start the application, which allocates and sets up a JFrame.

An instance of BallWorld is constructed and set as the content pane for the JFrame. For this example, you could include the main method in the BallWorld class, and discard the Main class.

Instead of the Main class, we could use a MainApplet class to run this program as an Java applet. Applet extends from JApplet or Applet , and uses init instead of main to begin operation. Our program contains many classes. How to distribute these classes? The answer is via a single JAR file. We shall prepare a JAR file such that we can run our program as a standalone application via Main.

Distribute Stand-alone Application in a JAR file: To run a standalone program from a jar file, we need to prepare a so-called manifest says " BallWorld. Run the JDK's jar utility from a cmd shell to jar-up all the classes as follow the command-line options are: ' c ' for create, ' v ' for verbose, ' m ' for manifest, ' f ' for jar's filename :.

You can use the Java runtime with " -jar " option to run the standalone application from the JAR file as follow or simply double-click the JAR file. The embedded manifest specifies the main class to start the application. The JAR files are separated by space?!

There is no need to include the current directory?! You may include additional JAR files in the archive attribute. The jar files are separated by commas. Gross motor practice without even knowing it! Or think bigger, and take it outside on the driveway and use a volleyball or basketball and have them aim for a hula hoop or draw sidewalk targets with sidewalk chalk.

Activity Pro Tip: To collect the supplies needed for any game or activity, I like to ask my kids to join me. This adds to their enjoyment as they are instantly intrigued to find out what we will be doing with the items we have gathered from the home. Think about how you can make this bouncy ball game easier for toddlers if you have a younger child, or more advanced for older kids.

The bouncy balls are likely enough entertainment! If you have older kids, you can add in learning elements. Challenge them to how many in a row they can get to stay in the basket at one time. This easy, no-prep at home bouncy ball game is sure to make your kids laugh and giggle as they play.

Pass your child some bouncy balls and watch how fun it is to try to get the bouncy balls to actually land in the laundry basket. They bounce everywhere! My girls love it when I join in the game fun! Another Activity Pro Tip! Submit comment failed, please try again Submit. Bouncing Letters Form words with the letter balls and destroy them all! Bouncing Balls Battle Battle against other players in this addictive classic!

Tic Tac Rings Line up the rings to win.