Question about random numbers

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#1

I am trying to mimic Minecraft slime chunk generation algorithm, but it seems that the random algorithm used in Lua Random class is different from Java.

I tried searching the source code of Java Random in a search engine, but the output of the Lua version looks different

Here is my current Lua code

local JavaRandom = {}
JavaRandom.__index = JavaRandom

function JavaRandom.new(Seed: number)
	local RandomObject = {
		Seed = bit32.band(Seed, bit32.lshift(1, 48) - 1),
		Multiplier = 0x5DEECE66D,
		Addend = 0xB,
		Mask = bit32.lshift(1, 48) - 1
	}
	
	setmetatable(RandomObject, JavaRandom)
	
	return RandomObject
end

function JavaRandom:Next(Bits)
	self.Seed = bit32.band(self.Seed * self.Multiplier + self.Addend, self.Mask)
	return bit32.rshift(self.Seed, 48 - Bits)
end

function JavaRandom:NextInteger(Num: number?)
	if Num == nil then
		return self:Next(32)
	else
		if Num <= 0 then
			error("Num must be positive")
		end

		if bit32.band(Num, -Num) == Num then
			return bit32.rshift(bit32.band(Num * self:Next(31), 0x7FFFFFFF), 31)
		end

		local Bits, Val
		repeat
			Bits = self:Next(31)
			Val = bit32.band(Bits, 0x7FFFFFFF) % Num
		until Bits - Val + (Num - 1) >= 0
		
		return Val
	end
end

return JavaRandom

My English is not very good, so I use Google Translate