## Uses of Interface
com.sun.jdi.ThreadGroupReference

- Packages that use ThreadGroupReference
  Package | Description
  --- | ---
  com.sun.jdi | This is the core package of the Java Debug Interface (JDI), it defines mirrors for values, types, and the target VirtualMachine itself - as well bootstrapping facilities.

- - ### Uses of ThreadGroupReference in com.sun.jdi

    Methods in com.sun.jdi that return ThreadGroupReference
    Modifier and Type | Method | Description
    --- | --- | ---
    `ThreadGroupReference` | ThreadGroupReference.`parent()` Returns the parent of this thread group.
    `ThreadGroupReference` | ThreadReference.`threadGroup()` Returns this thread's thread group.

    Methods in com.sun.jdi that return types with arguments of type ThreadGroupReference
    Modifier and Type | Method | Description
    --- | --- | ---
    `List<ThreadGroupReference>` | ThreadGroupReference.`threadGroups()` Returns a List containing each active `ThreadGroupReference` in this thread group.
    `List<ThreadGroupReference>` | VirtualMachine.`topLevelThreadGroups()` Returns each thread group which does not have a parent.

Copyright © 1999, 2026, Oracle and/or its affiliates. All rights reserved.