java.lang.management
Interface GarbageCollectorMXBean
public
interface
GarbageCollectorMXBean
extends MemoryManagerMXBean
Provides access to information about the garbage collectors
of the virtual machine. Garbage collectors are responsible
for removing unreferenced objects from memory. A garbage
collector is a type of memory manager, so this interface
is combined with that of generic memory managers. An instance
of this bean for each garbage collector is obtained by calling
{@link ManagementFactory#getGarbageCollectorMXBeans()}.
Since: 1.5
| Method Summary |
|---|
| long | getCollectionCount()
Returns the number of collections the garbage collector
represented by this bean has made. |
| long | getCollectionTime()
Returns the accumulated number of milliseconds this garbage
collector has spent freeing the memory used by unreferenced
objects. |
public long getCollectionCount()
Returns the number of collections the garbage collector
represented by this bean has made. -1 is returned if the
collection count is undefined.
Returns: the number of collections made, or -1 if this is
undefined.
public long getCollectionTime()
Returns the accumulated number of milliseconds this garbage
collector has spent freeing the memory used by unreferenced
objects. -1 is returned if the collection time is undefined.
Note that the accumulated time may not change, even when the
collection count increases, if the time taken is sufficiently
short; this depends on the resolution of the timer used.
Returns: the accumulated number of milliseconds spent collecting,
or -1 if this is undefined.