How to sort array of objects based on order of another array

I have an ArrayList of Strings in a certain particular order

ArrayList<String> sortedkeys

And I have an unordered set of objects

Set<Skugroup> unsortedSet

Where SkuGroup contains a key to be used for sorting

Class SkuGroup {
   private String sortkey;
   private String name; 
}

I need to copy all the SkuGroup objects into a new array in the same order of sortedSkus, where the sortedkey value is the same as the SkuGroup->sortkey

How can I accomplish this?

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