Apr 8, 2025 · This method is used to return the iterator of the set. The elements from the set are returned in a random order. This method is used to remove the given element from the set. This method returns True if the specified element is present in the Set otherwise it returns False.

Mar 30, 2016 · You are able to return it then. Set<classB> setElements = new HashSet<classB>(); public classA(classB x, class B y) { setElements.add(x); setElements.add(y); Share

Mar 31, 2016 · It does return a Set, but you must understand, that a Set is more than just the interface: Every implementation of every class that implements Set can be returned. public Set getMySet(){ return new HashSet(); } since HashSet implements Set, this …

Aug 19, 2016 · public static <E> E get(NavigableSet<E> set, E key) { return set.tailSet(key, true).floor(key); } The things are slightly trickier for HashSet and its descendants like LinkedHashSet :

Apr 1, 2025 · This Java Set Tutorial Explains All about the Set Interface in Java. It covers how to Iterate through a Set, Set Methods, Implementation, Set to List etc.

Returns true if this set contains all of the elements of the specified collection. Compares the specified object with this set for equality. Returns the hash code value for this set. Returns true if this set contains no elements. Returns an iterator over the elements in this set.

Returns an unmodifiable Set containing the elements of the given Collection.

As with Java 8, we can use stream with filter and collection functions to return a Set from a collection. The following code collects only odd numbers to a Set from the listNumbers above: Set<Integer> uniqueOddNumbers = listNumbers.stream() .filter(number -> number % 2 != 0).collect(Collectors.toSet()); System.out.println(uniqueOddNumbers);

Jul 16, 2024 · A set in Java represents a mathematical set, wherein you can perform various operations such as union, intersection, and difference. You can do this with the help of addAll(), retainAll(), and removeAll() methods for the above three operations, respectively.

Apr 23, 2015 · You "can" return a value, but by convention setters don't return a value. As setters generally are used in a manner where one doesn't even reference a return value it is quite easy for any caller of your class to ignore that you are returning a value.