Here you can find the source of getFreeLiveMemory()
public static long getFreeLiveMemory()
//package com.java2s; /* Soot - a J*va Optimization Framework * Copyright (C) 2007 Manu Sridharan//from www . ja va 2s.c o m * * 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 { public static long getFreeLiveMemory() { Runtime r = Runtime.getRuntime(); r.gc(); return r.freeMemory(); } }