I am trying to generate a world with the Spigot API using the built-in PerlinNoiseGenerator class. I am making a bunch of randomly generated terrain. However, it looks nothing at all like a Minecraft world should. It looks something like the image here.

I have tried modifying the noise type (from Perlin to Simplex) and changing the multiplier for the offset. Nothing works. Please help if you can! (Code is attached here)