CHAPTER 23
COLLECTION FRAMEWORK
When we start studying a programming language, we work with simple primitive data types. Then we study objects and arrays. When we start programming for real-life problems, two things happen: the size of data we handle increases and the processing also gets involved.
At this stage the program development time increases. The execution time of the program also becomes significant.
Therefore, at this stage when we want to handle huge data, we must have appropriate tools with us. Java comes with the answer––a “collection framework”.
By collection, we mean an object which groups multiple elements in a single group. The elements in general are data objects. Examples are library books, student records, and so on. The ...
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