1 /*
   2  * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.lang.management;
  27 
  28 /**
  29  * Types of {@link MemoryPoolMXBean memory pools}.
  30  *
  31  * @author  Mandy Chung
  32  * @since   1.5
  33  */
  34 public enum MemoryType {
  35 
  36     /**
  37      * Heap memory type.
  38      * <p>
  39      * The Java virtual machine has a <i>heap</i>
  40      * that is the runtime data area from which
  41      * memory for all class instances and arrays are allocated.
  42      */
  43     HEAP("Heap memory"),
  44 
  45     /**
  46      * Non-heap memory type.
  47      * <p>
  48      * The Java virtual machine manages memory other than the heap
  49      * (referred as <i>non-heap memory</i>).  The non-heap memory includes
  50      * the <i>method area</i> and memory required for the internal
  51      * processing or optimization for the Java virtual machine.
  52      * It stores per-class structures such as a runtime
  53      * constant pool, field and method data, and the code for
  54      * methods and constructors.
  55      */
  56     NON_HEAP("Non-heap memory");
  57 
  58     private final String description;
  59 
  60     private MemoryType(String s) {
  61         this.description = s;
  62     }
  63 
  64     /**
  65      * Returns the string representation of this {@code MemoryType}.
  66      * @return the string representation of this {@code MemoryType}.
  67      */
  68     public String toString() {
  69         return description;
  70     }


  71 }
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