Java - using Map how to find matching Key when Values are stored a List of strings

Question

All,

I have a map with categories and subcategories as lists like this:

    Map> cat = new HashMap

        

Answer 1

You have to search for the value in the entire map:

for (Entry> entry : cat.entrySet()) {
    for (String s : entry.getValue()) {
        if (s.equals("Carrot"))
            System.out.println(entry.getKey());
    }
}