Where can I find the button texture in a resource pack in Minecraft?

Where can I find the button texture in a resource pack in Minecraft?

I don't know if the button pack is also there, but I got my texture packs from the marketplase. But I have no idea whether this is also possible in the Java Edition or whether it costs something.

There's no marketplace in Java

That's what I mean by Ka, whether that's also possible on the Java 😂 only got the Bedrock

They automatically get the texture of the block from which they are created.

Do you mean the buttons in the menu? At./assets/minecraft/textures/gui/widgets.png