--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/lang/management/GarbageCollectorMXBean.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2003-2004 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package java.lang.management;
+
+/**
+ * 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
+ * {@link MemoryManagerMXBean memory manager}.
+ *
+ * <p> A Java virtual machine may have one or more instances of
+ * the implementation class of this interface.
+ * An instance implementing this interface is
+ * an <a href="ManagementFactory.html#MXBean">MXBean</a>
+ * that can be obtained by calling
+ * the {@link ManagementFactory#getGarbageCollectorMXBeans} method or
+ * from the {@link ManagementFactory#getPlatformMBeanServer
+ * platform <tt>MBeanServer</tt>} method.
+ *
+ * <p>The <tt>ObjectName</tt> for uniquely identifying the MXBean for
+ * a garbage collector within an MBeanServer is:
+ * <blockquote>
+ *   {@link ManagementFactory#GARBAGE_COLLECTOR_MXBEAN_DOMAIN_TYPE
+ *    <tt>java.lang:type=GarbageCollector</tt>}<tt>,name=</tt><i>collector's name</i>
+ * </blockquote>
+ *
+ * A platform usually includes additional platform-dependent information
+ * specific to a garbage collection algorithm for monitoring.
+ *
+ * @see MemoryMXBean
+ *
+ * @see <a href="../../../javax/management/package-summary.html">
+ *      JMX Specification.</a>
+ * @see <a href="package-summary.html#examples">
+ *      Ways to Access MXBeans</a>
+ *
+ * @author  Mandy Chung
+ * @since   1.5
+ */
+public interface GarbageCollectorMXBean extends MemoryManagerMXBean {
+    /**
+     * Returns the total number of collections that have occurred.
+     * This method returns <tt>-1</tt> if the collection count is undefined for
+     * this collector.
+     *
+     * @return the total number of collections that have occurred.
+     */
+    public long getCollectionCount();
+
+    /**
+     * Returns the approximate accumulated collection elapsed time
+     * in milliseconds.  This method returns <tt>-1</tt> if the collection
+     * elapsed time is undefined for this collector.
+     * <p>
+     * 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.
+     *
+     * @return the approximate accumulated collection elapsed time
+     * in milliseconds.
+     */
+    public long getCollectionTime();
+
+
+}