Java: The Complete Reference™ by Herbert Schildt

Author:Herbert Schildt
Language: eng
Format: epub
Publisher: McGraw-Hill
Published: 2011-05-03T16:00:00+00:00

The Legacy Classes and Interfaces

As explained at the start of this chapter, early versions of java.util did not include the Collections Framework. Instead, it defined several classes and an interface that provided an ad hoc method of storing objects. When collections were added (by J2SE 1.2), several of the original classes were reengineered to support the collection interfaces. Thus, they are now technically part of the Collections Framework. However, where a modern collection duplicates the functionality of a legacy class, you will usually want to use the newer collection class. In general, the legacy classes are supported because there is still code that uses them.

One other point: none of the modern collection classes described in this chapter are synchronized, but all the legacy classes are synchronized. This distinction may be important in some situations. Of course, you can easily synchronize collections by using one of the algorithms provided by Collections.

The legacy classes defined by java.util are shown here:

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.