remove first element from set c++ code example

Example 1: C++ remove element from set

std::set<int> s {1,2,3};
s.erase(2);

Example 2: remove first element of set

Set<String> set = Collections.newSetFromMap(new LinkedHashMap<String, Boolean>(){
    protected boolean removeEldestEntry(Map.Entry<String, Boolean> eldest) {
        return size() > MAX_ENTRIES;
    }
});

Example 3: remove an element from a set

list.remove(element)