jdk/src/share/classes/java/lang/management/MemoryType.java

/*
 * 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
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 */

package java.lang.management;

/**
 * Types of {@link MemoryPoolMXBean memory pools}.
 *
 * @author  Mandy Chung
 * @since   1.5
 */
public enum MemoryType {

    /**
     * Heap memory type.
     * <p>
     * The Java virtual machine has a <i>heap</i>
     * that is the runtime data area from which
     * memory for all class instances and arrays are allocated.
     */
    HEAP("Heap memory"),

    /**
     * Non-heap memory type.
     * <p>
     * The Java virtual machine manages memory other than the heap
     * (referred as <i>non-heap memory</i>).  The non-heap memory includes
     * the <i>method area</i> and memory required for the internal
     * processing or optimization for the Java virtual machine.
     * It stores per-class structures such as a runtime
     * constant pool, field and method data, and the code for
     * methods and constructors.
     */
    NON_HEAP("Non-heap memory");

    private final String description;

    private MemoryType(String s) {
        this.description = s;
    }

    /**
     * Returns the string representation of this <tt>MemoryType</tt>.
     * @return the string representation of this <tt>MemoryType</tt>.
     */
    public String toString() {
        return description;
    }

    private static final long serialVersionUID = 6992337162326171013L;
}