The array list is considered when the user needs to create a dynamic array that contains objects and which can be added and removed at runtime.ĪrrayList is a class and hence provides a few constructors. The namespace used by the Array list is System. Obj is a type of object to be stored in List.List list = new List () Īn array list is created by extending AbstractList and implements the list interface. Once an object is created by a user can restrict the type of object which can be stored in the list. A list is used to get objects that are related to their index numbers. Java List extends the Collection framework and uses the namespace. Public class ArrayList extends AbstractList implements List, RandomAccess, Cloneable, Serializable The syntax to declare an Array list is as follows: The syntax to declare a list is as follows: Array lists are dynamic and can be created with initial size, and later the size can be increased if more data is added, and also, it can be decreased if any data is removed. Once an array is created in Java, its size cannot be increased or decreased. Normal arrays that are used in Java are of fixed length. Many of the methods in a list can throw Unsupported Operation Exception if the collection cannot be modified.Īrray List is a class that extends the Abstract List, and it implements the List interface. A list can also contain duplicate elements. A list can have some additional methods along with the ones present in the Collection. As it extends Collection it declares its behavior and stores a sequence of elements. The list is an interface that extends Collection. Java List vs Array List Comparisons Tableįollowing is the comparison table between Java List vs Array List The basis of Comparison These methods enable getting elements from an array at the specified position and remove and shrink the size of an array in case of the Array list. Both Java List vs Array List provides different kinds of methods to access data from the list.Array list, on the contrary, creates an array of objects where the array can grow dynamically whenever required and reduce as well. List interface creates a collection of elements that are stored in sequence and can be accessed by its index number.The Java List interface extends the Collection, and the Array list extends the abstract listening class, and it can also implement the List interface.One of the major differences is between Java List vs Array List is that list is an interface, and the Array list is a standard collection class.The Differences Between Java List vs Array List are explained in the below-mentioned points: Key Differences between Java List and Array List
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