Questions tagged [java]
Java is both a popular object-oriented programming language and runtime environment which allows Java programs to run unchanged on most hardware and software platforms.
3,440 questions
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Objects move with different speed on different devices
I was making a 2d top-down game, but when I tested it on two devices (Samsung M31 and Samsung S25) there was a problem with player speed - it was faster on S25 and slower on M31. I tried using some ...
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LootJS/Forge GLM injecting items fails due to mod-internal overwrite (Apocalypse Now/Lost Cities)
I am trying to have modded items in the chests of lost cites mod, and there is this problem I am facing, in which a mod called Apocalypse Now automatically injects its mod items into the chests ...
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SquidSquad - how to use WildernessGenerator and Biomes
I'm starting to create a roguelike, and stumbled upon SquidSquad, which has an amazing collection of algorithms and other stuff related to roguelikes.
However, for some parts, documentation is really ...
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Having trouble creating a ModGUIConfig with a custom category
I'm working on a mod for 1.7.10 Forge that needs a complex config for the user to set up, but only the "general" category shows up (from ...
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How to configure multi-project for minecraft server mod for different ports using common code with minecraft mappings?
I want to make a gradle multi-project to port a server mod I made for Forge to Paper.
The problem I'm facing is that the common project doesn't recognise any ...
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DB for RPG game item: Should I stick with RDB?
I'm currently developing third-party app to existing rpg game which serves useful information about the game. I don't have much experience of game-related development.
The game provides api for ...
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87
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How do camera matrix multiplications work?
I was trying to make a 3d renderer in Java and was very confused about how to multiply the camera matrices correctly. So for the camera transformation matrix (T) I need a translation matrix (C) and ...
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Adding extra octaves for note blocks in Fabric 1.21.1
How would I extend the range of note blocks in Minecraft? I'm using a Fabric mod template for 1.21.1.
I only started coding about a week ago, so I barely have any idea what I'm doing; as much ...
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85
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How to destroy/remove Texture after collision in java box2d
I'm coding a simple Arkanoid/Breakout game and have problems with removing the bricks. I'm able to destroy the body but the texture is still there. I'm a beginner so is there a simple way to remove it ...
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65
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LibGDX Model not rendering
I've been trying to learn libgdx's 3D functionality, because I want to make a turn-based game set on a 3D hexagonally tiled sphere.
As a simple starter project, I decided to try to create a simple ...
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66
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How to make a Minecraft Villager walk to a Location?
For Minecraft, utilizing the Bukkit/Spigot API, I have a LivingEntity Villager that I would like to path, or "walk" to ...
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Player sprite becomes smaller during attack animation (Java)
I'm developing a 2D game in Java using Java Swing, and I've run into an issue with my player character's attack animation. The player has both movement and attack animations:
Movement sprites: 16x16 ...
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LibGDX TiledMap - get embedded objects from TextureMapObject
Is there a way of getting embedded objects defined within Tiled's collision editor from TextureMapObjects?
It'd be great if I could place texture objects around on an object layer and also include ...
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How to implement proportional guidance in 2D
I would like to preface this by saying I am not a dedicated game developer.
I am trying to implement proportional navigation in order to create a missile class that receives the target location every ...
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361
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How do I fix java.lang.ClassNotFoundException: org.lwjgl.glfw.GLFW
I have not used Java in a while and thought I might try LWJGL with OpenGL and GLFW.
I am using Apache Maven as a Build System.
It lets me compile the program, but when I run it, it says:
...
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88
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Connecting bodies together in jbox2d
Im trying to connect bodies together to make some sort of a "building" system or more specifically im trying to make multiple "blocks" connect to eachother but Struggling to figure ...
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168
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Comparison of 2 different quaternion axes
I am trying to compare the Z-axis and the X-axis of two different quaternions in a way that would give me the Euler angles about the X and Y axes to line up the two different axes. In my program, the ...
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Back-face culling not working
I'm trying to figure out back-face culling, with little results.
My code, from what i've gathered:
...
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2
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336
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Making a game loop to run multiple threads
I'm having a really hard time understanding Threads and their contents.
What I'd like to have is a main game object (which I have) and a loop, where I can measure the time it takes for two threads to ...
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96
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Black screen when sizing JFrame/JPanel with Toolkit.getDefaultToolkit().getScreenSize()
I am working on a game engine.
...
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3
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146
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Reduce processing time of image to shape
I'm making a simple game engine using Java and have found a major issue.
To create accurate collision detection I decided to convert a transparent image into a ...
2
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1
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153
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Skill Class design : How to deal with multiple criteria
I'm planning to make a Class for RPG game's character skill.
But the problem is that the skills need to be classified by multiple criteria.
Below are the criteria for skills.
Independent / dependent
...
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96
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How to save score without resetting to 0 between Game Scene and Pause Scene?
I'm currently working on a LibGDX Java Game Project inspired by the Space Invaders game where I have created 2 Scene Classes: LevelScene and ...
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1
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507
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How to to make KeyListener do an action only once per press, even if the button is held down?
I'm trying to make a turn-based game where my character is allow to move in any direction, but only by as much as the dice rolled allows him.
My problem is with how I'm using ...
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JBullet - Shoving around objects
Sometimes in video games the players can walk up to certain objects for example boxes and barrels and shove them around.
How can I recreate this system? What function do I have to use to apply force ...
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1
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236
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Programming Singletons vs Static classes
I've been developping a 3D app for some time and I remember at some point I started to need to pass data arround in unrelated areas of the program, where it wouldn't make much sense to pass them ...
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1
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294
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GLSL wrong data read from attribute
I'm developping an OpenGLes 3.0 app with Java and I started writing the shader code. For some reason, it seems to mix up the attributes data locations and I don't understand why. Here's the code :
...
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How to store condition dependent item information in JSON
I'm developing a RPG-game. After searching about various ways to save item information in RPG-game, I determined to save information in JSON files. The problem is that in my game, some equipment's ...
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92
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LWJGL3. A strange graphic artifact of OpenGL 3.x
I work in java with lwjgl3. I came across a strange artifact, the source of which I have not been able to determine for a very long time. I'm drawing a large surface. When I approach this surface and ...
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I use skin composer, I want to create scene in scene composer, I can't add text buttons even though I created text buttons
I create text buttons, add every image and font, but it's still disabled when I want to add button in scene composer. I'm probably doing something wrong.
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How do I go about making an enemy change depending on where the player hit it?
Currently coding in java, using cocos engine, making a low-poly game with a world which changes based on what the player does, hopefully including the aspect of an enemy changing when the player hits ...
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276
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Brick Breaker - Adjust ball's collision angle without affecting speed
I'm working on a Java Brick Breaker game, and it's functional so far. However, I'm facing an issue with collisions. Currently, when the ball collides it simply reverses its direction.
I want to ...
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Image fragments when moving up and or left
Not entirely sure how to resolve the issue as I am quite new to programming, however this seems to be my last option in terms of finding an adequate solution.
EDIT: https://streamable.com/0i92xq - ...
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492
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Realistic bouncing ball physics
I am trying to implement realistic physics for my game plinko. As of now i only implemented the inversion of the velocity and the distance between both objects.
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1
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Modifying LibGDX vector2's seems to do nothing
I have a piece of code similar to this:
Vector2 test = new Vector2().setLength(20).setAngleDeg(45);
But when I'm trying to print its contents (such as ...
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73
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Only first line/column of level text file gets loaded into tile map
I'm trying to make a map using a text file, but it only does the first line / column and not the rest.
I know the problem is in getTileImage.
...
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How would I make a self updating launcher for my game in Java?
I have a game I am working on, and I want to make a launcher for it. I am having trouble finding information on how to do it in Java (my video game is programmed in Java, so I do not want to use C#, ...
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Is it appropriate to design heroes as items in game development?
If you were to design a multi character game like "Genshin Impact", would you design the character(hero) as a item?
What is an item: in our game design, an item is an object within the game ...
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speeding up image manipulation for shadows- engineless
so my project is a ray-casted lighting system thats trying to implement soft shadows. the ray casting is working currently, so right now my focus is on performance of the soft shadows portion.
i use ...
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1
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278
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Unknown enum type when modding Minecraft recipes with CraftTweaker
I want to make some new Recipes with CraftTweaker, which uses machines from the Create mod (I'm using Life In The Village 3), but I have the following error in my scripts:
...
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1
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285
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How to improve performance of LiBGDX Android app?
After creating a few bodies and a map with collisions, the app performance clearly goes down. However, RAM and CPU don't seem fully stuck, but the game experience is horrible nonetheless.
GameScreen ...
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209
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Good design for player input handling in 2d game
I am working on a java 2d game. Keeping things short, I'd like to improve my current input handling. Basically the player can move up/down/left/right with WASD, perform an attack with mouse left click ...
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233
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Canvas vs JPanel in game development?
I'm new to Java and I have seen that some games use Canvas and some use JPanel as the class that Game class inherits from. Here is a sample project but it's a bit old. I am not sure what should I use ...
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1
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785
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How do I implement Minecraft Forge Config GUI (1.8.x)
So I have recently been working on a minecraft 1.8.9 forge mod, just to play around and see what there is (eventually I am planning on making a utilities mod with versions for 1.8-1.19, which is why I'...
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Android TMX library no tile animation
Did anyone use this library? I am wondering if this library has a possibility to display tile animation? When I try to show my "abc_main.tmx" map (created in Tiled application) the tile with ...
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Animate buttons sliding in
I am developing my first libGDX game.
I want to animate the buttons on the stage, so they transition into view instead of just popping into appearance. For example, each button should slide in from ...
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214
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How to get the correct display mode refresh rate as a float in Java?
The following example prints 59 on my system, because the return type of getRefreshRate is int.
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730
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How to enable V-Sync in Java?
I have used the BufferStrategy, but my code runs still way too fast. xrandr reports that TearFree is "on" and the ...
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i have a strange bug with collision, is there any way around this or do i have to pick a different method?
so lately i've been learning about abstract classes and interfaces, and i saw a neat yt video about falling sand games (think Noita) so i wanted to take a crack at it as some particles share a ...