Jini network technology provides simple mechanisms which enable devices to plug together to form an impromptu community - a community put together without any planning, installation, or human intervention. Each device provides services that other devices in the community may use. These devices provide their own interfaces, which ensures reliability and compatibility.
Jini's licensing has got a lot more flexible. There's no logo requirement, licenses are free and evergreen - the last for the lifetime of the licensee - and like Java, Sun only requires that they pass certification. But this being self-certification, is a lot less onerous than the Java requirement.
Source : Site de Sun