→ Week 6 Inheritance Vector, ArrayList And LinkedList →开始学习 /下载MP3 Flashcards

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问题		答案
What are some of the problems of array structures? 开始学习		all elements must be same type, number of elements predetermined, inefficent
what does ArrayIndexOutOfBoundsException message indicate? 开始学习		you are making reference to an array index that is larger or smaller than the actual array.
what is a Vector 开始学习		the vector class in java is a kind of list that can grow as needed
What is a linkedList 开始学习		A linked list is a data structure that consists of a sequence of nodes, where each node contains some data and the address of the next node.
what will happen when you add an 11th item to: Vector(10); 开始学习		the vector will double its allocated space
when would you use a vector? 开始学习		if a thread-safe implementation is needed
if a thread-safe implementation is not needed what class would you use inplace of vector? 开始学习		ArrayList
are linked lists synchronised or unsynchronised? 开始学习		unsynchronised
what code do you use to rentern the number of items in an array list? 开始学习		int size();
what does Object get(int index); do for ArrayLists? 开始学习		//returns element at index without removing it
what does Object remove(int index) do for ArrayLists? 开始学习		//removes element at index and shifts up rest

Week 6 Inheritance Vector, ArrayList and LinkedList