This class represents a
group of threads and allows that group to
be manipulated as a whole. A ThreadGroup can
contain THRead objects, as well as other child
ThreadGroup objects. All
ThreadGroup objects are created as children of
some other THReadGroup, and thus there is a
parent/child hierarchy of ThreadGroup objects. Use
getParent( ) to
obtain the parent ThreadGroup, and use
activeCount( )
,
activeGroupCount( ), and the various
enumerate( ) methods to list the child
Thread and THReadGroup objects.
Most applications can simply rely on the default system thread group.
System-level code and applications such as servers that need to
create a large number of threads may find it convenient to create
their own THReadGroup objects, however.
interrupt( )
interrupts all threads in the group at once. setMaxPriority(
) specifies the maximum priority any thread in the group
can have. checkAccess( ) checks whether the
calling thread has permission to modify the given thread group. The
method throws a SecurityException if the current
thread does not have access. uncaughtException( )
contains the code that is run when a thread terminates because of an
uncaught exception or error. You can customize this method by
subclassing ThreadGroup.
public class ThreadGroup implements Thread.UncaughtExceptionHandler {
// Public Constructors
public ThreadGroup(String name);
public ThreadGroup(ThreadGroup parent, String name);
// Public Instance Methods
public int activeCount( );
public int activeGroupCount( );
public final void checkAccess( );
public final void destroy( );
public int enumerate(ThreadGroup[ ] list);
public int enumerate(Thread[ ] list);
public int enumerate(Thread[ ] list, boolean recurse);
public int enumerate(ThreadGroup[ ] list, boolean recurse);
public final int getMaxPriority( );
public final String getName( );
public final ThreadGroup getParent( );
1.2 public final void interrupt( );
public final boolean isDaemon( );
1.1 public boolean isDestroyed( ); synchronized
public void list( );
public final boolean parentOf(ThreadGroup g);
public final void setDaemon(boolean daemon);
public final void setMaxPriority(int pri);
public void uncaughtException(Thread t, Throwable e);
Implements:Thread.UncaughtExceptionHandler
// Methods Implementing Thread.UncaughtExceptionHandler
public void uncaughtException(Thread t, Throwable e);
// Public Methods Overriding Object
public String toString( );
// Deprecated Public Methods
1.1# public boolean allowThreadSuspension(boolean b);
# public final void resume( );
# public final void stop( );
# public final void suspend( );
}
