Oct 7, 2022 · The add(E element) of java.util.Collection interface is used to add the element ‘element’ to this collection. This method returns a boolean value depicting the successfulness of the operation. If the element was added, it returns true, else it returns false. Syntax: Collection.add(E element)

Apr 20, 2015 · List<DataCollection> list = new LinkedList<DataCollection>(); list.add(d1); You can iterate like below: List<DataCollection> list=new LinkedList<DataCollection>(); for(DataCollection d : list){ System.out.println(d); }

Mar 21, 2025 · Calling a method allows to reuse code and organize our program effectively. Java Methods are the collection of statements used for performing certain tasks and for returning the result to the user. In this article, we will learn how to call different types of methods in Java with simple examples. Ex

Apr 26, 2016 · I am new to this collection's concept in Java. And from the below code I could see the elements are added using the method "a1.add". Here comes my question, is the add method implemented anywhere l...

Nov 26, 2018 · The add() method in Java AbstractCollection is used to add a specific element into a Collection. This method will add the element only if the specified element is not present in the Collection else the function will return False if the element is already present in the Collection. Syntax: AbstractCollection.add(Object element)

May 3, 2023 · The add() method in Java is a very useful method that allows us to add elements to a collection. It is a part of the Collection interface, which is a member of the Java Collections Framework. We can use this method with different types of collections such as ArrayList, HashSet, and LinkedList, etc.

Mar 24, 2025 · The add () method of Java Collection Interface inserts the specified element in this Collection. It returns a Boolean value 'true', if it succeeds to insert the element in the specified collection else it returns 'false'. The parameter 'e' represents …

Mar 22, 2011 · If your collection is intended to hold only instances of Class1, you should do: Collection<Class1> c; Class1 object1 = new Class1(); c.add(object1);

Nov 24, 2019 · add() method: This add method in java utilizes to add the given element in collection. boolean add(E e); Where, E represents the type of elements in collection. e is the element which you want to add in this collection. return type: Its return type is boolean. It can return either true or false.

Apr 10, 2025 · Some of the methods of Collection interface are Boolean add (Object obj), Boolean addAll (Collection c), void clear(), etc. that are implemented by all the subclasses of Collection interface. List Interface. List interface is the child interface of Collection interface.