how to implement these methods in java

Set, Set(List) - Constructors to initialize an empty set and a set containing a specified list of elements, respectively. addElement(int) - Adds an element to the set. removeElement(int) - Removes an element from the set. isInSet(int) - Checks if a specific value is in the set. empty() - Clears the contents of the set (i.e., removes all elements from the set) boolean isEmpty() - Checks if the set is empty. int size() - Returns the number of elements in the set. List to List() - Returns the elements in the set as a List of Integers. complement() -Replaces the contents of the set with its complement. Set union(Set S) - Returns the union of the set with S as a new Set. Set intersection(Set S) - Return the intersection of the set with S as a new Set