| Package | Description | 
|---|---|
| java.lang | Provides classes that are fundamental to the design of the Java
 programming language. | 
| Modifier and Type | Method and Description | 
|---|---|
| ThreadGroup | ThreadGroup. getParent()Returns the parent of this thread group. | 
| ThreadGroup | Thread. getThreadGroup()Returns the thread group to which this thread belongs. | 
| ThreadGroup | SecurityManager. getThreadGroup()Returns the thread group into which to instantiate any new
 thread being created at the time this is being called. | 
| Modifier and Type | Method and Description | 
|---|---|
| void | SecurityManager. checkAccess(ThreadGroup g)Throws a  SecurityExceptionif the
 calling thread is not allowed to modify the thread group argument. | 
| int | ThreadGroup. enumerate(ThreadGroup[] list)Copies into the specified array references to every active
 subgroup in this thread group and its subgroups. | 
| int | ThreadGroup. enumerate(ThreadGroup[] list,
         boolean recurse)Copies into the specified array references to every active
 subgroup in this thread group. | 
| boolean | ThreadGroup. parentOf(ThreadGroup g)Tests if this thread group is either the thread group
 argument or one of its ancestor thread groups. | 
| Constructor and Description | 
|---|
| Thread(ThreadGroup group,
      Runnable target)Allocates a new  Threadobject. | 
| Thread(ThreadGroup group,
      Runnable target,
      String name)Allocates a new  Threadobject so that it hastargetas its run object, has the specifiednameas its name,
 and belongs to the thread group referred to bygroup. | 
| Thread(ThreadGroup group,
      Runnable target,
      String name,
      long stackSize)Allocates a new  Threadobject so that it hastargetas its run object, has the specifiednameas its name,
 and belongs to the thread group referred to bygroup, and has
 the specified stack size. | 
| Thread(ThreadGroup group,
      String name)Allocates a new  Threadobject. | 
| ThreadGroup(ThreadGroup parent,
           String name)Creates a new thread group. | 
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