package com.hypixel.hytale.builtin.hytalegenerator.datastructures; import java.util.HashSet; import java.util.Set; import javax.annotation.Nonnull; public class CollectionFactory { @Nonnull public static Set hashSetOf(@Nonnull T... elements) { Set set = new HashSet<>(elements.length); for (T element : elements) { if (element == null) { throw new NullPointerException("elements can't be null"); } set.add(element); } return set; } }