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I want to create a large (~300,000 entries) List of self defined objects of the class Drug.
Every Drug has an ID and I want to be able to search the Drugs in logarithmic time via that ID.
What kind of List do I have to use?
How do I declare that it should be searchable via the ID?
The various implementations of the Map interface should do what you want.
Just remember to override the hashCode() method of your Drug class if you plan to use a HashMap.