Properties in Java

Properties are configuration values managed as key/value pairs. In each pair, the key and value are both String values. The key identifies, and is used to retrieve, the value, much as a variable name is used to retrieve the variable's value. For example, an application capable of downloading files might use a property named "download.lastDirectory" to keep track of the directory used for the last download.

To manage properties, create instances of java.util.Properties. This class provides methods for the following:

• loading key/value pairs into a Properties object from a stream,
• retrieving a value from its key,
• listing the keys and their values,
• enumerating over the keys, and
• saving the properties to a stream.

References:

1. Properties in JAVA