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Java: The Complete Reference™, Eighth Edition by Herbert Schildt

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CHAPTER 17java.util Part 1: The Collections Framework

This chapter begins our examination of java.util. This important package contains a large assortment of classes and interfaces that support a broad range of functionality. For example, java.util has classes that generate pseudorandom numbers, manage date and time, observe events, manipulate sets of bits, tokenize strings, and handle formatted data. The java.util package also contains one of Java’s most powerful subsystems: the Collections Framework. The Collections Framework is a sophisticated hierarchy of interfaces and classes that provide state-of-the-art technology for managing groups of objects. It merits close attention by all programmers.

Because java.util contains a wide array of functionality, ...

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