If I specify a System property multiple times when invoking JVM which value is used?

Posted by RobV on Stack Overflow See other posts from Stack Overflow or by RobV
Published on 2012-06-08T22:20:11Z Indexed on 2012/06/08 22:40 UTC
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java

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jvm

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system-properties

If I specify a system property multiple times when invoking the JVM which value will I actually get when I retrieve the property? e.g.

java -Dprop=A -Dprop=B -jar my.jar

What will be the result when I call System.getProperty("prop");?

The Java documentation on this does not really tell me anything useful on this front.

In my non-scientific testing on a couple of machines running different JVMs it seems like the last value is the one returned (which is actually the behavior I need) but I wondered if this behavior is actually defined officially anywhere or can it vary between JVMs?

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