Here you can find the source of getJavaMemorySize(String string)
private static long getJavaMemorySize(String string)
//package com.java2s; /*//from www . j av a 2 s . c om * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright 1997-2012 Oracle and/or its affiliates. All rights reserved. * * Oracle and Java are registered trademarks of Oracle and/or its affiliates. * Other names may be trademarks of their respective owners. * * The contents of this file are subject to the terms of either the GNU General * Public License Version 2 only ("GPL") or the Common Development and Distribution * License("CDDL") (collectively, the "License"). You may not use this file except in * compliance with the License. You can obtain a copy of the License at * http://www.netbeans.org/cddl-gplv2.html or nbbuild/licenses/CDDL-GPL-2-CP. See the * License for the specific language governing permissions and limitations under the * License. When distributing the software, include this License Header Notice in * each file and include the License file at nbbuild/licenses/CDDL-GPL-2-CP. Oracle * designates this particular file as subject to the "Classpath" exception as * provided by Oracle in the GPL Version 2 section of the License file that * accompanied this code. If applicable, add the following below the License Header, * with the fields enclosed by brackets [] replaced by your own identifying * information: "Portions Copyrighted [year] [name of copyright owner]" * * Contributor(s): * * The Original Software is NetBeans. The Initial Developer of the Original Software * is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun Microsystems, Inc. All * Rights Reserved. * * If you wish your version of this file to be governed by only the CDDL or only the * GPL Version 2, indicate your decision by adding "[Contributor] elects to include * this software in this distribution under the [CDDL or GPL Version 2] license." If * you do not indicate a single choice of license, a recipient has the option to * distribute your version of this file under either the CDDL, the GPL Version 2 or * to extend the choice of license to its licensees as provided above. However, if * you add GPL Version 2 code and therefore, elected the GPL Version 2 license, then * the option applies only if the new code is made subject to such option by the * copyright holder. */ public class Main { public static final String DIGITS_PATTERN = "[0-9]+"; public static final long K = 1024; public static final long M = K * K; public static final long G = M * K; public static final long T = G * K; private static long getJavaMemorySize(String string) { String suffix = string.substring(string.length() - 1); if (!suffix.matches(DIGITS_PATTERN)) { long value = Long.parseLong(string.substring(0, string.length() - 1)); if (suffix.equalsIgnoreCase("k")) { value *= K; } else if (suffix.equalsIgnoreCase("m")) { value *= M; } else if (suffix.equalsIgnoreCase("g")) { value *= G; } else if (suffix.equalsIgnoreCase("t")) { value *= T; } return value; } else { return new Long(string).longValue() * M; // default - megabytes } } }