Lecture 7: Collections presents Collections, Interfaces, Implementations, Algorithm; A collection, also called a container, is an object that groups multiple elements into a single unit. | Lecture 7: Collections Lê Hồng Phương phuonglh@ Department of Mathematics, Mechanics and Informatics, Vietnam National University, Hanoi Content ● Collections ● Interfaces ● Implementations ● Algorithms ● Exercises August, 2012 2 Collections ● ● A collection, also called a container, is an object that groups multiple elements into a single unit. Collections are used to store, retrieve, manipulate data. – A collection of cards, a mail folders, a telephone directory. August, 2012 3 A collection framework ● ● A collection framework is a unified architecture for representing and manipulating collections. Three components of a collection framework: – Interfaces: abstracts data types that represent collections – Implementations: concrete implementations of collection interfaces – Algorithms: methods that perform useful computations such as searching and sorting on objects implementing collection interfaces. August, 2012 4 Benefits of the Java collection framework ● Reduces programming efforts ● Increases program speed and quality ● Allows interoperability among unrelated APIs ● Reduces effort to learn and to use new APIs ● Reduces effort to design new APIs ● Fosters software reuse August, .
