/* * Copyright (c) 2003, 2004, Oracle and/or its affiliates. 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.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.management; import sun.management.counter.Counter; /** * Hotspot internal management interface for the thread system. */public interface HotspotThreadMBean {     /**     * Returns the current number of VM internal threads.     *     * @return the current number of VM internal threads.     */    public int getInternalThreadCount();     /**     * Returns a <tt>Map</tt> of the name of all VM internal threads     * to the thread CPU time in nanoseconds.  The returned value is     * of nanoseconds precision but not necessarily nanoseconds accuracy.     * <p>     *     * @return a <tt>Map</tt> object of the name of all VM internal threads     * to the thread CPU time in nanoseconds.     *     * @throws java.lang.UnsupportedOperationException if the Java virtual     * machine does not support CPU time measurement.     *     * @see java.lang.management.ThreadMBean#isThreadCpuTimeSupported     */    public java.util.Map<String,Long> getInternalThreadCpuTimes();     /**     * Returns a list of internal counters maintained in the Java     * virtual machine for the thread system.     *     * @return a list of internal counters maintained in the VM     * for the thread system.     */    public java.util.List<Counter> getInternalThreadingCounters();}