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Since Java 1.2, HashMap<K, V> class has been part of the Java collection. This class can be found in java.util package. It implements the Java Map interface in its most basic form. If you try to insert the duplicate key, it will replace the associated key’s element. The key index makes it simple to conduct […]
August 1, 2022 | Java | No comments
The LinkedHashSet class is an ordered HashSet with a doubly-linked List across all entries. This class is used when the iteration order must be maintained. The order of the elements in a HashSet is unpredictable, whereas a LinkedHashSet allows us to iterate through them in the order in which they were inserted. Declaration of LinkedHashSet: […]
July 30, 2022 | Java | No comments
The Java HashSet class is used to create a collection that stores data in a hash table. It derives from AbstractSet and implements the Set interface. This class allows for the null element. The class also provides constant time performance for fundamental operations such as add, delete, contains, and size, assuming the hash function properly […]
July 29, 2022 | Java | No comments
Java includes a map interface. A mapping between a key and a value is represented by the util package. The Collection interface does not have a subtype called Map. As a result, it operates differently than the other collection types. A map comprises distinct keys. Duplicate keys are not permitted in a Map, although duplicate […]
July 28, 2022 | Java | No comments
TreeSet is a widespread Java implementation of the SortedSet interface that employs a Tree for storage. Whether an explicit comparator is provided, a set maintains the ordering of the components using their natural ordering. If the Set interface is to be correctly implemented, this must be compatible with equals. TreeSet class Declaration: The following are […]
July 26, 2022 | Java | No comments
The Collection framework is found in java.util package includes Linked List. This class is an implementation of the LinkedList data structure, a linear data structure where each element is a separate object with a data part and address part and is not kept in a single location. Pointers and addresses are used to connect the […]
July 24, 2022 | Java | No comments
The java.util package contains the collection foundation component ArrayList. In Java, it offers us dynamic arrays. Although it might be slower than conventional arrays, it can be useful in programs that require a lot of array manipulation. The java.util package contains this class. Java ArrayList class Declaration: crucial things to keep in mind: Duplicate elements […]
July 23, 2022 | Java | No comments
You will frequently wish to repeat the collection’s pieces. You might want to show each element, for instance. Using an iterator—an object that implements either the Iterator or the ListIterator interface—is the simplest way to accomplish this. You can cycle over a collection using an iterator, adding or removing elements as you go. ListIterator is […]
July 22, 2022 | Java | No comments
The Java Collections Framework includes the Collections class in the Java.util.Collections package. The static methods that work with collections or return collections are essentially utilized with the collections class. If the collection or object supplied to the methods is null, all the methods of this class raise the NullPointerException. Syntax: Collections class fields: Following are the […]
July 22, 2022 | Java | No comments
Numerous Interfaces in the Collections framework define the fundamental characteristics of distinct collection classes. Collection Interface: The interface that all classes in the collection framework implement is called the Collection interface. It identifies the methods each collection will contain. To put it another way, the Collection interface creates the basis upon which the collection framework […]
July 21, 2022 | Java | No comments