| JavaTM 2 Platform Std. Ed. v1.5.0
java.lang.management
Interface GarbageCollectorMXBean
- All Superinterfaces:
- MemoryManagerMXBean
public interface GarbageCollectorMXBean - extends MemoryManagerMXBean
The management interface for the garbage collection of
the Java virtual machine. Garbage collection is the process
that the Java virtual machine uses to find and reclaim unreachable
objects to free up memory space. A garbage collector is one type of
memory manager.
A Java virtual machine may have one or more instances of
the implementation class of this interface.
An instance implementing this interface is
an MXBean
that can be obtained by calling
the ManagementFactory.getGarbageCollectorMXBeans() method or
from the platform MBeanServer method.
The ObjectName for uniquely identifying the MXBean for
a garbage collector within an MBeanServer is:
java.lang:type=GarbageCollector,name=collector's name
A platform usually includes additional platform-dependent information
specific to a garbage collection algorithm for monitoring.
- Since:
- 1.5
- See Also:
MemoryMXBean,
JMX Specification.,
Ways to Access MXBeans
|
Method Summary |
long |
getCollectionCount()
Returns the total number of collections that have occurred. |
long |
getCollectionTime()
Returns the approximate accumulated collection elapsed time
in milliseconds. |
getCollectionCount
long getCollectionCount()
- Returns the total number of collections that have occurred.
This method returns -1 if the collection count is undefined for
this collector.
- Returns:
- the total number of collections that have occurred.
getCollectionTime
long getCollectionTime()
- Returns the approximate accumulated collection elapsed time
in milliseconds. This method returns -1 if the collection
elapsed time is undefined for this collector.
The Java virtual machine implementation may use a high resolution
timer to measure the elapsed time. This method may return the
same value even if the collection count has been incremented
if the collection elapsed time is very short.
- Returns:
- the approximate accumulated collection elapsed time
in milliseconds.
Copyright 2003 Sun Microsystems, Inc. All rights reserved
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