Question

Let’s say I have a list containing some key-value pairs, and an array containing a number of value.

public boolean hasSameKey(List<Map.Entry<Key, Value>> list, Value ... values) {
    return ?;
}

What I would like to check is that if all values in values have an entry in list with the same key.

Edit
To clarify, each key in the list may have keys with several values

Answer 1

From what I get from your question, I would first change your method signature a little to take Map<Key, List<Value>> as first parameter.

Then you can proceed like this: –

public boolean hasSameKey(Map<Key, List<Value>> map, Value... values) {

    for (Key key: map.keySet()) {
        if (map.get(key).containsAll(Arrays.asList(values))) {
            return true;
        }
    }
    return false;
}

• map.get(key) – Gets the List<Value> for that corresponding key.
• List#containsAll method checks whether all the elements in a particular collection is in that list or not.