INTERVIEW QUESTIONS J2EE JAVA DETAILS

Question: What is the difference between array list and linked list. in which situations we are use them? which is best one?

Answer: public class ArrayList
extends AbstractList
implements List, RandomAccess, Cloneable, Serializable
Resizable-array implementation of the List interface. Implements all optional list operations, and permits all elements, including null. In addition to implementing the List interface, this class provides methods to manipulate the size of the array that is used internally to store the list. (This class is roughly equivalent to Vector, except that it is unsynchronized.)

public class LinkedList
extends AbstractSequentialList
implements List, Cloneable, Serializable
Linked list implementation of the List interface. Implements all optional list operations, and permits all elements (including null). In addition to implementing the List interface, the LinkedList class provides uniformly named methods to get, remove and insert an element at the beginning and end of the list. These operations allow linked lists to be used as a stack, queue, or double-ended queue (deque).

public class ArrayList
extends AbstractList
implements List, RandomAccess, Cloneable, Serializable
Resizable-array implementation of the List interface. Implements all optional list operations, and permits all elements, including null. In addition to implementing the List interface, this class provides methods to manipulate the size of the array that is used internally to store the list. (This class is roughly equivalent to Vector, except that it is unsynchronized.)

public class LinkedList
extends AbstractSequentialList
implements List, Cloneable, Serializable
Linked list implementation of the List interface. Implements all optional list operations, and permits all elements (including null). In addition to implementing the List interface, the LinkedList class provides uniformly named methods to get, remove and insert an element at the beginning and end of the list. These operations allow linked lists to be used as a stack, queue, or double-ended queue (deque).
Source: CoolInterview.com

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