I made a simple "snake" game in java. As an exercise I want to control the user-input and the graphical-preview of the game separately using interfaces.
I have created 2 interfaces for that: InputSystem and GraphicalSystem.
So my main-loop of the game looks something like that:
while (snake.isAlive()) {
byte direction = inputSystem.getDirection(snake); // get input from user
snake.moveDirection(direction); // move in the game
graphicalSystem.update(); // preview current game state
The problem I've encountered is the implementation of the InputSystem interface. More precisely I try to make it a keyboard-input kind of thing. (while my GraphicalSystem is a GUI that I have already implemented).
The only way I found to receive a keyboard input was using some kind of GUI. But my GraphicalSystem is already using GUI. I also don't want to add the keyListener into the GraphicalSystem, because it will miss the whole idea of separating inputs and graphics. Do you have any suggestions for what should I do? I would love any idea.
Thanks in advance :)
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Good Day (or night) Everyone!
I was lately developing a little game and decided to use javax.swing (basically JFrame stuff xD) and KeyListener.
Now, my basic game loop was a thread, so it went smoothly with my KeyListener.
So now I was able to get input from the KeyListener, process the input, and make an output.
But then I had to make a function that would draw all the things that I wanted drawn on the JFrame.
This took quite a bit of the computing power I had and made my game slower. But that wasn't the problem.
The problem occurred when I had to use that function multiple times almost at once, which didn't let the KeyListener run at all.
So now my big question is, what would be the preferred method to prevent the interruption?
Can I use some sort of Thread but for voids to prevent this?
Big Thanks from Me to Whoever solves my question! :D
I'm trying to create a grid of buttons, each with a relatively simple GUI (or at least so I though):
The button is halved by a a diagonal line and a space for two numbers received as input.
I've been trying to implement it using BasicButtonUI but facing difficulties. I'm wondering if that's the correct tool to the job, or maybe as a newbie to Swing I'm missing a smarter way to do it.
I wrote a simple little maze game for a terminal which repeatedly asks the user to do something (e.g. "In which direction would you like to go? [N/E/S/W]"). I have a navigate() method running in a loop that fires off these questions, stores their answers and does something depending on the answer.
public enum Dir (N, E, S, W);
public void navigate() {
Dir nextDir = utils.askDirection("Which way do you want to go?");
// Do stuff with answer, like changing position of user in maze
}
Now, I've written a simple GUI for my game. I deliberately put all the references to the terminal in a ConsoleUtils class which implements a Utils interface (this has methods like askQuestion()) - the idea being that I could create a GuiUtils class and have my game either as a terminal game or as a GUI game.
The problem is that the navigate method asks the user a question and then "waits" for the response, which the Utils class gives it by using a Scanner to read the newest line of input. However if I use Event Listeners for the new N/E/S/W buttons in my GUI, they fire off events regardless whether the navigate method has asked for one or not.
--> Image of GUI
Is there any way I can combine this or do I need to write a new navigate method for the GUI?
(To be honest, I'm also not entirely sure whether my GUI class should instantiate a game class, in which case the logic for navigate could end up in a GUI method anyway, or whether the game should have a GUI. I haven't written any code for the event listener either yet, since I'm not sure which class should be calling which. This is probably a separate question.)
Your text based game has a loop that repeatedly asks questions to gather user input. Swing provides this loop for you by continually executing Runnable blocks of code that have been posted to the EventQueue. For example, when the user presses a button labeled E, code is posted to the queue that invokes your ActionEvent implementation to handle your game's interpretation of the move east command.
For reference, a complete example of a very simple guessing game is examined here. In pseudocode, the corresponding text based game might look like this:
initialize
loop
prompt "Guess what color!"
get chosenColor
if chosenColor = actualColor
say "You win!"
reset game
else
say "Keep trying."
end loop
A more elaborate game cited there includes the original text-based source.
I have finished writing a Hangman game, but I want to move the hangman out of the canvas when the game is over. I create that hangman with any partition of his body. When I move the object it can move only one object at a time. How can I bunch them together?
You have to create an object of the class GCompound. This class of object allows you to create new object that can be manipulated like GOval and so. In the Stanford course, there is an example called GFace.
Probably you can refactor your code to make the whole hangman one object through the whole implementation and whenever needed make different parts visible. When the time comes to remove him, just dispose of the whole thing either by resetting them to non-visible or try making a new object I guess... If you cna post the code of your implementation I may be able to give you some more help...
I am making a knight's tour implementation in java, and currently I have everything jumbled into one giant mess of code.
I have a class called MainFrame which includes the code to solve the knights tour as well as methods for the menu, etc.
I want to create a new class called KT (for knights tour) which will contain the code for the algorithm, but I'm having lots of issues doing that.
I don't want to post code here because i dont want someone from my class copying or something, so I will just briefly explain.
In class KT, I have declared the variables, arrays, etc. I have methods such as printSolution, move, redo (the backtracking), etc.
However I am unsure how to tie in the code for the buttons (which is declared in MainFrame). For example, I have a loop in the print method that prints the correct solution on the 8x8 board. Right now I'm being asked to create a new method for the button even though I have the button in class MainFrame.
I have a KT k = new KT(); and then I'm launching MainFrame. Is that where I am doing it wrong or is it something really simple that I'm being too dumb to figure out?
tl;dr program works well when i have everything in one class, but i want to make two classes and make everything "look" nice
First of all, give your KnightTour class an actual name. Like, you know, KnightTour. If you were coding this for cash money, the next guy who had to read your code would want to punch the guy who called a class something like KT.
Think about creating this class so that you can use it from a GUI controller like your button and menu laden applet. But so that it can ALSO be used from, say, a character based application where you type commands at a prompt and have your new class evaluate those commands.
The reason I suggest this is because it will force you to create your KnightTour class so that it is PURELY the "business logic" for your app. By that I mean that your KnightTour class should not know anything about buttons, menus, GUIs, text interfaces, or anything like that. You need to think about your KnightTour class in terms of what it must accomplish.
I don't really know what KnightTour does. So I'll just throw out some ideas of what kind of functionality it might need to support. I'm assuming everything takes place on a chess board?
Get the state (occupied, unoccupied) for a given board location (x,y)
Put a chess piece (piece enumerator) on a given location (x,y)
Validate placement of a piece (piece enumerator, location x,y)
Suggest a move, returning a Suggestion object with a piece enumerator and location
Reset the board to start all over.
Now, when you push a button that says "place a piece on 5,5" then you'll handle that event in your GUI controller, and then call the "set piece" method (#2 above) to do that work. If you have a character based application, when you type "put knight at 5,5" then you'll parse that text, and then invoke #2 above. The key point is that both of those user interfaces access the same KnightTour methods to do the same work.
In the actionPerformed method of your MainFrame class just call the appropriate methods to get the solution from KT (which, by the way, I would rename to KnightsTour...readability counts).
Ideally you want all your logic (the model) broken up into sensible methods in KnightsTour, and all your display and button-handling code (the view and controller) in MainFrame. If that's difficult, it's a good sign that you need to rethink how you divided things into methods (and what you're doing with global state...which is frowned upon).
I'm sorry I can't be more specific--I'm kind of hand-tied since you didn't post code.