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 72 private static final long serialVersionUID = 6992337162326171013L; 73 }