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Java™ for COBOL Programmers, Third Edition by John C. Byrne

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11 Java Collections

Collections provide the ability to manage groups of objects. A collection can be ordered or unordered, contain duplicates or not, depending upon the particular implementation chosen. Collections can also contain key-value pairs to provide a facility for maintaining in memory an index of objects.

What’s wonderful about collections for the COBOL programmer is the automatic memory management that lies behind the group of objects. Unlike COBOL arrays, space does not need to be allocated in ...

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