GarbageCollectorMXBean
implements MemoryManagerMXBean| java.lang.management.GarbageCollectorMXBean |
 Known Indirect Subclasses
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Class Overview
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 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.
Summary
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Returns the total number of collections that have occurred.
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Returns the approximate accumulated collection elapsed time
in milliseconds.
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From interface
java.lang.management.MemoryManagerMXBean
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Public Methods
public abstract 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.
public abstract 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.