Explain about ArrayList class? ArrayList is a Collection which can be used to represent a group of objects as a single entity. • it is a implemented class for List interface • Introduced in 1.2 version • The underlying data structure is resizable or growable array. • Insertion order is preserved • Duplicates are allowed • Heterogeneous objects are allowed • null insertion is possible • This class implements RandomAccess , Serializable , Cloneable interfaces • Best choice for retrieval purpose and worst if our frequent operation is insertion or deletion in the middle
Posted on: Thu, 30 Jan 2014 11:24:24 +0000
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