Here you can find the source of getMemoryUsage()
static long getMemoryUsage()
//package com.java2s; /*/*from w w w.ja v a 2s. c om*/ * Copyright (C) 2012 Rico Argentati * * This file is part of SPARSE-EIG. * * This library is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by the * Free Software Foundation; either version 2.1 of the License, or (at your * option) any later version. * * This library 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 Lesser General Public License * for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ public class Main { static long getMemoryUsage() { Runtime runtime = Runtime.getRuntime(); long memoryInUse = runtime.totalMemory(); return memoryInUse; } }