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  Tutorial: Preferences

The java.util.pref.Preferences class

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The java.util.pref.Preferences class, which was added in Java 1.4 to provide improved functionality over the java.util.Properties class, is used to store and get persistent (remains on disk between program executions) hierarchical name/values pairs. These preferences are stored in an operating system dependent manner, eg in the Windows registry or a Mac preferences file, but you don't have to be concerned with the actual way it is stored. Both system and user preferences can be obtained.

Package. The method of using Preferences described below gets a Preference object associated with the package of the current application, which effectively gives each program a unique set of preferences. Use of unique package names is therefore very important.


 

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