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## com.sun.jdi
Interface ThreadGroupReference

All Superinterfaces:
  Mirror, ObjectReference, Value

public interface ThreadGroupReference
extends ObjectReference

A thread group object from the target VM. A ThreadGroupReference is an `ObjectReference` with additional access to threadgroup-specific information from the target VM.

Since:
  1.3

Field Summary

Fields inherited from interface com.sun.jdi.ObjectReference
`INVOKE_NONVIRTUAL, INVOKE_SINGLE_THREADED`

Method Summary
`String` | `name()` Returns the name of this thread group.
`ThreadGroupReference` | `parent()` Returns the parent of this thread group.
`void` | `resume()` Resumes all threads in this thread group.
`void` | `suspend()` Suspends all threads in this thread group.
`List` | `threadGroups()` Returns a List containing each `ThreadGroupReference` in this thread group.
`List` | `threads()` Returns a List containing each `ThreadReference` in this thread group.

Methods inherited from interface com.sun.jdi.ObjectReference
`disableCollection, enableCollection, entryCount, equals, getValue, getValues, hashCode, invokeMethod, isCollected, owningThread, referenceType, setValue, uniqueID, waitingThreads`

Methods inherited from interface com.sun.jdi.Value
`type`

Methods inherited from interface com.sun.jdi.Mirror
`toString, virtualMachine`

Method Detail

### name

    public String name()

  Returns the name of this thread group.

  Returns:
    the string containing the thread group name.

### parent

    public ThreadGroupReference parent()

  Returns the parent of this thread group.

  Returns:
    a `ThreadGroupReference` mirroring the parent of this thread group in the target VM, or null if this is a top-level thread group.

### suspend

    public void suspend()

  Suspends all threads in this thread group. Each thread in this group and in all of its subgroups will be suspended as described in `ThreadReference.suspend()`. This is not guaranteed to be an atomic operation; if the target VM is not interrupted at the time this method is called, it is possible that new threads will be created between the time that threads are enumerated and all of them have been suspended.

### resume

    public void resume()

  Resumes all threads in this thread group. Each thread in this group and in all of its subgroups will be resumed as described in `ThreadReference.resume()`.

### threads

    public List threads()

  Returns a List containing each `ThreadReference` in this thread group. Only the threads in this immediate thread group (and not its subgroups) are returned.

  Returns:
    a List of `ThreadReference` objects mirroring the threads from this thread group in the target VM.

### threadGroups

    public List threadGroups()

  Returns a List containing each `ThreadGroupReference` in this thread group. Only the thread groups in this immediate thread group (and not its subgroups) are returned.

  Returns:
    a List of `ThreadGroupReference` objects mirroring the threads from this thread group in the target VM.

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