How to get which JRE version is used during runtime?

Hi.
I want to know in my application which JRE version the user is using. Is there some method in Properties Object?
Thank you in advance

System API tells all...
"The current set of system properties for use by the getProperty(String) method is returned as a Properties object. If there is no current set of system properties, a set of system properties is first created and initialized. This set of system properties always includes values for the following keys: "
Key                   Description of Associated Value
java.version          Java Runtime Environment version

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