001 /* 002 * Copyright (C) 2008-2010 by Holger Arndt 003 * 004 * This file is part of the Universal Java Matrix Package (UJMP). 005 * See the NOTICE file distributed with this work for additional 006 * information regarding copyright ownership and licensing. 007 * 008 * UJMP is free software; you can redistribute it and/or modify 009 * it under the terms of the GNU Lesser General Public License as 010 * published by the Free Software Foundation; either version 2 011 * of the License, or (at your option) any later version. 012 * 013 * UJMP is distributed in the hope that it will be useful, 014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 016 * GNU Lesser General Public License for more details. 017 * 018 * You should have received a copy of the GNU Lesser General Public 019 * License along with UJMP; if not, write to the 020 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 021 * Boston, MA 02110-1301 USA 022 */ 023 024 package org.ujmp.gui.statusbar; 025 026 import java.awt.Dimension; 027 import java.util.TimerTask; 028 029 import javax.swing.BorderFactory; 030 import javax.swing.JProgressBar; 031 032 import org.ujmp.gui.util.GlobalTimer; 033 034 public class MemoryUsage extends JProgressBar { 035 private static final long serialVersionUID = 5692292627429288637L; 036 037 public MemoryUsage() { 038 setBorder(BorderFactory.createEtchedBorder()); 039 setMinimumSize(new Dimension(50, 30)); 040 GlobalTimer.getInstance().schedule(new UpdateTask(this), 0, 1000); 041 } 042 043 public void update() { 044 int max = (int) Runtime.getRuntime().maxMemory() / 1048576; 045 int total = (int) Runtime.getRuntime().totalMemory() / 1048576; 046 int free = (int) Runtime.getRuntime().freeMemory() / 1048576; 047 int used = total - free; 048 setMinimum(0); 049 setMaximum(max); 050 setValue(used); 051 setToolTipText("" + used + "MB of " + max + "MB used"); 052 } 053 054 class UpdateTask extends TimerTask { 055 056 private MemoryUsage memoryUsage = null; 057 058 public UpdateTask(MemoryUsage memoryUsage) { 059 this.memoryUsage = memoryUsage; 060 } 061 062 063 public void run() { 064 memoryUsage.update(); 065 } 066 067 } 068 069 }