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Editorial Team
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Asked: 2026-05-26T19:36:31+00:00

We used a private method, through reflection, of a JDK class. Is there a

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We used a private method, through reflection, of a JDK class. Is there a guarantee this will not change in a future release ? what is the QoS of a private method for a JDK class ?

We used ThreadPoolExecutor.isStopped() which is actually missing in Java 6 v18. Is there an easy way knowing the minimum jdk required or how to check when a class is changing in Java?

Comments are welcomed and yes we know better not using private methods 🙂

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  1. Editorial Team

    We used a private method, through reflection, of a JDK class.

    Very bad idea.

    Is there a guarantee this will not change in a future release ?

    No. It may change or disappear in any minor release.

    what is the QoS of a private method for a JDK class ?

    If there were a service-level agreement involved here, you would have forfeited it by using reflection to access a method you should not.

    yes we know better not using private methods 🙂

    No, apparently you don’t.

    Why don’t you use isTerminated() or isTerminating(). From the API doc it seems that one of these should do what you need.

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