## Uses of Class
java.lang.IllegalStateException

- Packages that use IllegalStateException
  Package | Description
  --- | ---
  java.util.concurrent | Utility classes commonly useful in concurrent programming.

- - ### Uses of IllegalStateException in java.util.concurrent

    Subclasses of IllegalStateException in java.util.concurrent
    Modifier and Type | Class and Description
    --- | ---
    `class` | `CancellationException` Exception indicating that the result of a value-producing task, such as a `FutureTask`, cannot be retrieved because the task was cancelled.

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