![]() ![]() There may be chance of getting exceptions while working with collections. Most Commonly thrown Exceptions in Collections Framework As collections doesn't store primitive data types(stores only refrences), hence Autoboxing facilitates the storing of primitive data types in collection by boxing it into its wrapper type. We have studied that Autoboxing converts primitive types into Wrapper class Objects. Hence Generics was introduced through which you can explicitly state the type of object being stored. Hence there were chances of storing incompatible types in a collection, which could result in run time mismatch. Earlier collections stored Object class references which meant any collection could store any type of object. Generics added type safety to Collection framework. It is used to search the specified collection in the collection. It removes the total number of elements from the collection. It returns the total number of elements in the collection. It deletes all the elements of invoking collection except the specified collection. It deletes all the elements of the collection that satisfy the specified predicate. It deletes all the elements of the specified collection from the invoking collection.ĭefault boolean removeIf(Predicate filter) It deletes an element from the collection. It inserts the specified collection elements in the invoking collection. ![]() It inserts an element in this collection. Commonly Used Methods of Collection Framework Method Top of the framework, Collection framework is available and rest of interfaces are sub interface of it.Īll these Interfaces give several methods which are defined by collections classes which implement these interfaces. You can get idea how interfaces and classes are linked with each other and in what hierarchy they are situated. versatility to work with current collection as wellĮnables you to work with groups of object it is at the top of Collection hierarchyĮxtends Queue to handle double ended queue.Įxtends Collection to handle sequences list of object.Įxtends Collection to handle special kind of list in which element are removed only from the head.Įxtends Collection to handle sets, which must contain unique element.Ĭollection Framework hierarchy is represented by using a diagram.Provides interoperability between unrelated APIs by establishing a common language to pass collections back and forth.Increases performance by providing high-performance implementations of data structures and algorithms.It reduces programming effort by providing built-in set of data structures and algorithms.Algorithms that provides static methods to perform useful functions on collections, such as sorting a list.Concurrent implementation classes that are designed for highly concurrent use.Collection classes such as ArrayList, HashSet etc that are implementations of collection interfaces.These are used to collect different types of objects. Collection interfaces such as sets, lists, and maps.For example, list is used to collect elements and referred by a list object. It is used to store, fetch and manipulate data. What is collectionĬollection in java can be referred to an object that collects multiple elements into a single unit. ![]() It provides many important classes and interfaces to collect and organize group of objects. Java collections framework is contained in java.util package. Prior to Java 2, Java provided adhoc classes such as Dictionary, Vector, Stack and Properties to store and manipulate groups of objects. Java collection framework represents a hierarchy of set of interfaces and classes that are used to manipulate group of objects.Ĭollections framework was added to Java 1.2 version. Connecting to Access using Type-1 Driver.Method Overriding with Exception Handling.Difference between Classes And Interface. ![]()
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