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Both environment variables and system properties provide user-defined mappings between keys and their corresponding values and can be used to communicate those values from the environment to a process. According to the Java API \[[API 2006|AA. Bibliography#APIReferences#API 06]\] {{java.lang.System}} class documentation: |
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_The Java Tutorial_ \[[Campione 1996|AA. Bibliography#CampioneReferences#Campione 96]\] states: |
To maximize portability, never refer to an environment variable when the same value is available in a system property. For example, if the operating system provides a user name, it will always be available in the system property
user.name.
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