Java examples for java.lang:byte Array to String
get VM Memory String
/*/*from w ww . ja v a 2 s.c o m*/ * Copyright (c) 2013 mellowtech.org. * * The contents of this file are subject to the terms of one of the following * open source licenses: Apache 2.0 or LGPL 3.0 or LGPL 2.1 or CDDL 1.0 or EPL * 1.0 (the "Licenses"). You can select the license that you prefer but you may * not use this file except in compliance with one of these Licenses. * * You can obtain a copy of the Apache 2.0 license at * http://www.opensource.org/licenses/apache-2.0 * * You can obtain a copy of the LGPL 3.0 license at * http://www.opensource.org/licenses/lgpl-3.0 * * You can obtain a copy of the LGPL 2.1 license at * http://www.opensource.org/licenses/lgpl-2.1 * * You can obtain a copy of the CDDL 1.0 license at * http://www.opensource.org/licenses/cddl1 * * You can obtain a copy of the EPL 1.0 license at * http://www.opensource.org/licenses/eclipse-1.0 * * See the Licenses for the specific language governing permissions and * limitations under the Licenses. */ public class Main{ public static void main(String[] argv) throws Exception{ System.out.println(getVMMemoryString()); } static final long KB = 1024; static final long MB = 1024 * 1024; static final long GB = 1024 * 1024 * 1024; public static final String getVMMemoryString() { Runtime r = Runtime.getRuntime(); return "mem(free, total, max)=\t" + getSizeString(r.freeMemory()) + "\t" + getSizeString(r.totalMemory()) + "\t" + getSizeString(r.maxMemory()); } public static final String getSizeString(long bytes) { if (bytes < 0) return ""; if (bytes < KB) return "" + bytes + " B"; else if (bytes < MB) return "" + DataTypeUtils.fmt((double) bytes / KB) + " KB"; else if (bytes < GB) return "" + DataTypeUtils.fmt((double) bytes / MB) + " MB"; else return "" + DataTypeUtils.fmt((double) bytes / GB) + " GB"; } }