Uses of Class
java.util.Properties

Packages that use Properties 
Package Description
java.awt
Contains all of the classes for creating user interfaces and for painting graphics and images.
java.lang
Provides classes that are fundamental to the design of the Java programming language.
java.rmi.activation
Provides support for RMI Object Activation.
java.security
Provides the classes and interfaces for the security framework.
java.sql
Provides the API for accessing and processing data stored in a data source (usually a relational database) using the Java™ programming language.
java.util
Contains the collections framework, some internationalization support classes, a service loader, properties, random number generation, string parsing and scanning classes, base64 encoding and decoding, a bit array, and several miscellaneous utility classes.
javax.naming
Provides the classes and interfaces for accessing naming services.
javax.xml.transform
Defines the generic APIs for processing transformation instructions, and performing a transformation from source to result.