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3 days ago · In Java, a separate framework named the “Collection Framework” has been defined in JDK 1.2 which holds all the Java Collection Classes and Interface in it. In Java, the Collection interface (java.util.Collection) and Map interface (java.util.Map) are the two main “root” interfaces of Java collection classes.
- 9 min
5 days ago · In Java, the Queue interface is a subtype of the Collection interface and represents a collection of elements in a specific order. It follows the first-in, first-out (FIFO) principle, which means that the elements are retrieved in the order in which they were added to the queue.
3 days ago · In Java, HashMap is a part of Java’s collection since Java 1.2. This class is found in java.util package. It provides the basic implementation of the Map interface of Java. HashMap in Java stores the data in (Key, Value) pairs, and you can access them by an index of another type (e.g. an Integer).
- 7 min
5 days ago · Java Collection Framework offers a standardized way to store, retrieve, and process the collection of Data efficiently. Some key components of the Java Collection Framework include lists, sets, maps, queues, and several algorithms for sorting, and searching.
1 day ago · Vector is a legacy implementation of a list added to Java since version 1.0. It was later moved to the Java Collections Framework and retrofitted to implement the List interface. Vectors are synchronized. All the methods in the Vector class are synchronized, ensuring that only one thread can access a method at a time.
5 days ago · The ArrayList class is part of the Java collections framework and implements the List interface. Unlike arrays, ArrayLists can grow or shrink dynamically as elements are added or removed.
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3 days ago · Java 21 introduced three new interfaces to represent sequenced collections, sequenced sets, and sequenced maps. A sequenced collection is a collection whose elements have a defined encounter order. It has first and last elements, and the elements between them have successors and predecessors.
