2D LinkedList.contains() in Java

Hey, everyone. I'm new to Java and I have 2D LinkedList like this: > `LinkedList> albums = new LinkedList>();` Which is filled with data like so: > if (!artist.isEmpty() && !name.isEmpty()) { albums.add(new LinkedList()); albums.getLast().add(artist.toString()); albums.getLast().add(name.toString()); } But I want to make sure my list has no duplicate albums. How to check whenever my *albums* list already contains same pair of *artist* and *name*?

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