Hot Swapping

[Grayseon]

I'm loving this tool a lot! But, when I make a change I have to restart Minecraft every time. Is there a way I can enable hot swapping so I don't have to restart it? IDE: Intellij IDEA

Thank you!

[jacobo-mc]

No, that would require editing the jar file as you are playing and that would be next to impossible.

[Hexeption]

That is possible watch the video for how to do it

[Hexeption]

https://www.youtube.com/watch?v=ocz1tPI_YSE

[Grayseon]

Hi, thank you for the replies, but when I follow that video the game crashes. Here is the crash report:

---

---- Minecraft Crash Report ---- // Why is it breaking :(

Time: 11/4/21, 4:20 PM Description: Initializing game

java.lang.ExceptionInInitializerError at org.lwjgl.glfw.GLFW.glfwCreateWindow(GLFW.java:1842) at net.minecraft.client.MainWindow.(MainWindow.java:89) at net.minecraft.client.renderer.VirtualScreen.create(VirtualScreen.java:21) at net.minecraft.client.Minecraft.(Minecraft.java:418) at net.minecraft.client.main.Main.main(Main.java:149) at mcp.client.Start.main(Start.java:17) Caused by: java.lang.IllegalStateException: GLFW windows may only be created on the main thread and that thread must be the first thread in the process. Please run the JVM with -XstartOnFirstThread. For offscreen rendering, make sure another window toolkit (e.g. AWT or JavaFX) is initialized before GLFW. at org.lwjgl.glfw.EventLoop$OffScreen.(EventLoop.java:39) ... 6 more

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head -- Thread: Render thread Stacktrace: at org.lwjgl.glfw.GLFW.glfwCreateWindow(GLFW.java:1842) at net.minecraft.client.MainWindow.(MainWindow.java:89) at net.minecraft.client.renderer.VirtualScreen.create(VirtualScreen.java:21) at net.minecraft.client.Minecraft.(Minecraft.java:418)

-- Initialization -- Details: Stacktrace: at net.minecraft.client.main.Main.main(Main.java:149) at mcp.client.Start.main(Start.java:17)

-- System Details -- Details: Minecraft Version: 1.16.5 Minecraft Version ID: 1.16.5 Operating System: Mac OS X (x86_64) version 11.5 Java Version: 16.0.1, AdoptOpenJDK Java VM Version: OpenJDK 64-Bit Server VM (mixed mode, sharing), AdoptOpenJDK Memory: 152307344 bytes (145 MB) / 649068544 bytes (619 MB) up to 2147483648 bytes (2048 MB) CPUs: 4 JVM Flags: 0 total; Launched Version: mcp Backend library: LWJGL version 3.2.1 build 12 Backend API: NO CONTEXT GL Caps: Using VBOs: Yes Is Modded: Very likely; Jar signature invalidated Type: Client (map_client.txt) CPU:

I also try -XstartOnFirstThread argument, but it is still erroring.

[Grayseon]

I am so dumb... I was putting -XstartOnFirstThread in the program arguments, and not the VM arguments. What is the shortcut to hot swapping? I looked it up but couldn't find anything that works. Thank you!

(I am a beginner, as you can probably tell, sorry I am so bad at this!)

[gersomonline]

ctrl+f9

[josephworks]

I am so dumb... I was putting -XstartOnFirstThread in the program arguments, and not the VM arguments. What is the shortcut to hot swapping? I looked it up but couldn't find anything that works. Thank you!

(I am a beginner, as you can probably tell, sorry I am so bad at this!)

Is this resolved? Could you close the issue?

[MrTheShy]

@Hexeption The video you linked is now private, and i cant figure out how to make hot swap working

[josephworks]

Thanks!