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| java.lang.Object | |
| ↳ | java.lang.ThreadGroup |
ThreadGroup is a means of organizing threads into a hierarchical structure.
This class is obsolete. See Effective Java Item 73, "Avoid thread groups" for details.
| Public Constructors | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Constructs a new
ThreadGroup with the given name. | |||||||||||
Constructs a new
ThreadGroup with the given name, as a child of the
given ThreadGroup. | |||||||||||
| Public Methods | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Returns the number of running
Threads which are children of this thread group,
directly or indirectly. | |||||||||||
Returns the number of
ThreadGroups which are children of this group,
directly or indirectly. | |||||||||||
This method was deprecated
in API level 1.
Required deprecated method
suspend().
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Does nothing.
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Destroys this thread group and recursively all its subgroups.
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Iterates over all active threads in this group (and its sub-groups) and
stores the threads in the given array.
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Iterates over all thread groups in this group (and, optionally, its
sub-groups) and stores the groups in the given array.
| |||||||||||
Iterates over all active threads in this group (and, optionally, its
sub-groups) and stores the threads in the given array.
| |||||||||||
Iterates over all thread groups in this group (and its sub-groups) and
and stores the groups in the given array.
| |||||||||||
Returns the maximum allowed priority for a
Thread in this thread group. | |||||||||||
Returns the name of this thread group.
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Returns this thread group's parent
ThreadGroup. | |||||||||||
Interrupts every
Thread in this group and recursively in all its
subgroups. | |||||||||||
Checks whether this thread group is a daemon
ThreadGroup. | |||||||||||
Checks whether this thread group has already been destroyed.
| |||||||||||
Outputs to
System.out a text representation of the
hierarchy of Threads and ThreadGroups in this thread group (and recursively). | |||||||||||
Checks whether this thread group is a direct or indirect parent group of a
given
ThreadGroup. | |||||||||||
This method was deprecated
in API level 1.
Requires deprecated method
resume().
| |||||||||||
Sets whether this is a daemon
ThreadGroup or not. | |||||||||||
Configures the maximum allowed priority for a
Thread in this group and
recursively in all its subgroups. | |||||||||||
This method was deprecated
in API level 1.
Requires deprecated method
stop().
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This method was deprecated
in API level 1.
Requires deprecated method
suspend().
| |||||||||||
Returns a string containing a concise, human-readable description of this
object.
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Handles uncaught exceptions.
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[Expand]
Inherited Methods | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
From class
java.lang.Object
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From interface
java.lang.Thread.UncaughtExceptionHandler
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Constructs a new ThreadGroup with the given name. The new ThreadGroup
will be child of the ThreadGroup to which the calling thread belongs.
| name | the name |
|---|
Constructs a new ThreadGroup with the given name, as a child of the
given ThreadGroup.
| parent | the parent |
|---|---|
| name | the name |
| NullPointerException | if parent == null |
|---|---|
| IllegalThreadStateException | if parent has been
destroyed already
|
Returns the number of running Threads which are children of this thread group,
directly or indirectly.
Returns the number of ThreadGroups which are children of this group,
directly or indirectly.
This method was deprecated
in API level 1.
Required deprecated method suspend().
Does nothing. The definition of this method depends on the deprecated
method suspend(). The exact behavior of this call was never
specified.
| b | Used to control low memory implicit suspension |
|---|
true (always)Destroys this thread group and recursively all its subgroups. It is only legal
to destroy a ThreadGroup that has no threads in it. Any daemon
ThreadGroup is destroyed automatically when it becomes empty (no threads
or thread groups in it).
| IllegalThreadStateException | if this thread group or any of its subgroups has been destroyed already or if it still contains threads. |
|---|
Iterates over all active threads in this group (and its sub-groups) and stores the threads in the given array. Returns when the array is full or no more threads remain, whichever happens first.
Note that this method will silently ignore any threads that don't fit in the supplied array.
| threads | the array into which the Threads will be copied |
|---|
Threads that were copied
Iterates over all thread groups in this group (and, optionally, its sub-groups) and stores the groups in the given array. Returns when the array is full or no more groups remain, whichever happens first.
Note that this method will silently ignore any thread groups that don't fit in the supplied array.
| groups | the array into which the ThreadGroups will be copied |
|---|---|
| recurse | indicates whether ThreadGroups in subgroups should be
recursively copied as well or not |
ThreadGroups that were copied
Iterates over all active threads in this group (and, optionally, its sub-groups) and stores the threads in the given array. Returns when the array is full or no more threads remain, whichever happens first.
Note that this method will silently ignore any threads that don't fit in the supplied array.
| threads | the array into which the Threads will be copied |
|---|---|
| recurse | indicates whether Threads in subgroups should be
recursively copied as well |
Threads that were copied
Iterates over all thread groups in this group (and its sub-groups) and and stores the groups in the given array. Returns when the array is full or no more groups remain, whichever happens first.
Note that this method will silently ignore any thread groups that don't fit in the supplied array.
| groups | the array into which the ThreadGroups will be copied |
|---|
ThreadGroups that were copied
Returns the maximum allowed priority for a Thread in this thread group.
Returns the name of this thread group.
Returns this thread group's parent ThreadGroup. It can be null if this
is the the root ThreadGroup.
Interrupts every Thread in this group and recursively in all its
subgroups.
Checks whether this thread group is a daemon ThreadGroup.
ThreadGroupChecks whether this thread group has already been destroyed.
Outputs to System.out a text representation of the
hierarchy of Threads and ThreadGroups in this thread group (and recursively).
Proper indentation is used to show the nesting of groups inside groups
and threads inside groups.
Checks whether this thread group is a direct or indirect parent group of a
given ThreadGroup.
| g | the potential child ThreadGroup |
|---|
g
Sets whether this is a daemon ThreadGroup or not. Daemon
thread groups are automatically destroyed when they become empty.
| isDaemon | the new value |
|---|
Configures the maximum allowed priority for a Thread in this group and
recursively in all its subgroups.
A caller can never increase the maximum priority of a thread group. Such an attempt will not result in an exception, it will simply leave the thread group with its current maximum priority.
| newMax | the new maximum priority to be set |
|---|
| IllegalArgumentException | if the new priority is greater than Thread.MAX_PRIORITY or less than Thread.MIN_PRIORITY |
|---|
This method was deprecated
in API level 1.
Requires deprecated method stop().
Stops every thread in this group and recursively in all its subgroups.
Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:
getClass().getName() + '@' + Integer.toHexString(hashCode())
See Writing a useful
toString method
if you intend implementing your own toString method.
Handles uncaught exceptions. Any uncaught exception in any Thread
is forwarded to the thread's ThreadGroup by invoking this
method.
New code should use setUncaughtExceptionHandler(Thread.UncaughtExceptionHandler) instead of thread groups.
| t | the Thread that terminated with an uncaught exception |
|---|---|
| e | the uncaught exception itself |