Java Tutorial/2D Graphics/GraphicsEnvironment

Computes the center point of the current screen device.

/* 
 * JCommon : a free general purpose class library for the Java(tm) platform
 * 
 *
 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jcommon/index.html
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ----------------------
 * RefineryUtilities.java
 * ----------------------
 * (C) Copyright 2000-2005, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Jon Iles;
 *
 * $Id: RefineryUtilities.java,v 1.11 2007/11/02 17:50:36 taqua Exp $
 *
 * Changes (from 26-Oct-2001)
 * --------------------------
 * 26-Oct-2001 : Changed package to com.jrefinery.ui.*;
 * 26-Nov-2001 : Changed name to SwingRefinery.java to make it obvious that this is not part of
 *               the Java APIs (DG);
 * 10-Dec-2001 : Changed name (again) to JRefineryUtilities.java (DG);
 * 28-Feb-2002 : Moved system properties classes into com.jrefinery.ui.about (DG);
 * 19-Apr-2002 : Renamed JRefineryUtilities-->RefineryUtilities.  Added drawRotatedString()
 *               method (DG);
 * 21-May-2002 : Changed frame positioning methods to accept Window parameters, as suggested by
 *               Laurence Vanhelsuwe (DG);
 * 27-May-2002 : Added getPointInRectangle method (DG);
 * 26-Jun-2002 : Removed unnecessary imports (DG);
 * 12-Jul-2002 : Added workaround for rotated text (JI);
 * 14-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 08-May-2003 : Added a new drawRotatedString() method (DG);
 * 09-May-2003 : Added a drawRotatedShape() method (DG);
 * 10-Jun-2003 : Updated aligned and rotated string methods (DG);
 * 29-Oct-2003 : Added workaround for font alignment in PDF output (DG);
 * 07-Nov-2003 : Added rotateShape() method (DG);
 * 16-Mar-2004 : Moved rotateShape() method to ShapeUtils.java (DG);
 * 07-Apr-2004 : Modified text bounds calculation with TextUtilities.getTextBounds() (DG);
 * 21-May-2004 : Fixed bug 951870 - precision in drawAlignedString() method (DG);
 * 30-Sep-2004 : Deprecated and moved a number of methods to the TextUtilities class (DG);
 * 04-Oct-2004 : Renamed ShapeUtils --> ShapeUtilities (DG);
 * 11-Jan-2005 : Removed deprecated code in preparation for the 1.0.0 release (DG);
 *
 */
import java.awt.Dimension;
import java.awt.GraphicsEnvironment;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.lang.reflect.Method;
/**
 *
 *
 * @author David Gilbert
 */
public class Main{
  /**
   * Computes the center point of the current screen device. If this method is called on JDK 1.4, Xinerama-aware
   * results are returned. (See Sun-Bug-ID 4463949 for details).
   *
   * @return the center point of the current screen.
   */
  public static Point getCenterPoint ()
  {
    final GraphicsEnvironment localGraphicsEnvironment = GraphicsEnvironment.getLocalGraphicsEnvironment();
    try
    {
      final Method method = GraphicsEnvironment.class.getMethod("getCenterPoint", (Class[]) null);
      return (Point) method.invoke(localGraphicsEnvironment, (Object[]) null);
    }
    catch(Exception e)
    {
      // ignore ... will fail if this is not a JDK 1.4 ..
    }
    final Dimension s = Toolkit.getDefaultToolkit().getScreenSize();
    return new Point (s.width / 2, s.height / 2);
  }
  /**
   * Computes the maximum bounds of the current screen device. If this method is called on JDK 1.4, Xinerama-aware
   * results are returned. (See Sun-Bug-ID 4463949 for details).
   *
   * @return the maximum bounds of the current screen.
   */
    public static Rectangle getMaximumWindowBounds ()
    {
      final GraphicsEnvironment localGraphicsEnvironment = GraphicsEnvironment.getLocalGraphicsEnvironment();
      try
      {
        final Method method = GraphicsEnvironment.class.getMethod("getMaximumWindowBounds", (Class[]) null);
        return (Rectangle) method.invoke(localGraphicsEnvironment, (Object[]) null);
      }
      catch(Exception e)
      {
        // ignore ... will fail if this is not a JDK 1.4 ..
      }
      final Dimension s = Toolkit.getDefaultToolkit().getScreenSize();
      return new Rectangle (0, 0, s.width, s.height);
    }
}

Computes the maximum bounds of the current screen device. If this method is called on JDK inerama-aware results are returned.

/* 
 * JCommon : a free general purpose class library for the Java(tm) platform
 * 
 *
 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jcommon/index.html
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ----------------------
 * RefineryUtilities.java
 * ----------------------
 * (C) Copyright 2000-2005, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Jon Iles;
 *
 * $Id: RefineryUtilities.java,v 1.11 2007/11/02 17:50:36 taqua Exp $
 *
 * Changes (from 26-Oct-2001)
 * --------------------------
 * 26-Oct-2001 : Changed package to com.jrefinery.ui.*;
 * 26-Nov-2001 : Changed name to SwingRefinery.java to make it obvious that this is not part of
 *               the Java APIs (DG);
 * 10-Dec-2001 : Changed name (again) to JRefineryUtilities.java (DG);
 * 28-Feb-2002 : Moved system properties classes into com.jrefinery.ui.about (DG);
 * 19-Apr-2002 : Renamed JRefineryUtilities-->RefineryUtilities.  Added drawRotatedString()
 *               method (DG);
 * 21-May-2002 : Changed frame positioning methods to accept Window parameters, as suggested by
 *               Laurence Vanhelsuwe (DG);
 * 27-May-2002 : Added getPointInRectangle method (DG);
 * 26-Jun-2002 : Removed unnecessary imports (DG);
 * 12-Jul-2002 : Added workaround for rotated text (JI);
 * 14-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 08-May-2003 : Added a new drawRotatedString() method (DG);
 * 09-May-2003 : Added a drawRotatedShape() method (DG);
 * 10-Jun-2003 : Updated aligned and rotated string methods (DG);
 * 29-Oct-2003 : Added workaround for font alignment in PDF output (DG);
 * 07-Nov-2003 : Added rotateShape() method (DG);
 * 16-Mar-2004 : Moved rotateShape() method to ShapeUtils.java (DG);
 * 07-Apr-2004 : Modified text bounds calculation with TextUtilities.getTextBounds() (DG);
 * 21-May-2004 : Fixed bug 951870 - precision in drawAlignedString() method (DG);
 * 30-Sep-2004 : Deprecated and moved a number of methods to the TextUtilities class (DG);
 * 04-Oct-2004 : Renamed ShapeUtils --> ShapeUtilities (DG);
 * 11-Jan-2005 : Removed deprecated code in preparation for the 1.0.0 release (DG);
 *
 */
import java.awt.Container;
import java.awt.Dialog;
import java.awt.Dimension;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.lang.reflect.Method;
/**
 *
 *
 * @author David Gilbert
 */
public class Main{
  /**
   * Positions the specified dialog at a position relative to its parent.
   *
   * @param dialog  the dialog to be positioned.
   * @param horizontalPercent  the relative location.
   * @param verticalPercent  the relative location.
   */
  public static void positionDialogRelativeToParent(final Dialog dialog,
                                                    final double horizontalPercent,
                                                    final double verticalPercent) {
      final Dimension d = dialog.getSize();
      final Container parent = dialog.getParent();
      final Dimension p = parent.getSize();
      final int baseX = parent.getX() - d.width;
      final int baseY = parent.getY() - d.height;
      final int w = d.width + p.width;
      final int h = d.height + p.height;
      int x = baseX + (int) (horizontalPercent * w);
      int y = baseY + (int) (verticalPercent * h);
      // make sure the dialog fits completely on the screen...
      final Rectangle s = getMaximumWindowBounds();
      x = Math.min(x, (s.width - d.width));
      x = Math.max(x, 0);
      y = Math.min(y, (s.height - d.height));
      y = Math.max(y, 0);
      dialog.setBounds(x + s.x, y + s.y, d.width, d.height);
  }
  /**
   * Computes the maximum bounds of the current screen device. If this method is called on JDK 1.4, Xinerama-aware
   * results are returned. (See Sun-Bug-ID 4463949 for details).
   *
   * @return the maximum bounds of the current screen.
   */
    public static Rectangle getMaximumWindowBounds ()
    {
      final GraphicsEnvironment localGraphicsEnvironment = GraphicsEnvironment.getLocalGraphicsEnvironment();
      try
      {
        final Method method = GraphicsEnvironment.class.getMethod("getMaximumWindowBounds", (Class[]) null);
        return (Rectangle) method.invoke(localGraphicsEnvironment, (Object[]) null);
      }
      catch(Exception e)
      {
        // ignore ... will fail if this is not a JDK 1.4 ..
      }
      final Dimension s = Toolkit.getDefaultToolkit().getScreenSize();
      return new Rectangle (0, 0, s.width, s.height);
    }
}

Create an image that does not support transparency from GraphicsConfiguration

import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Transparency;
import java.awt.image.BufferedImage;
public class Main {
  public static void main(String[] argv) throws Exception {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice gs = ge.getDefaultScreenDevice();
    GraphicsConfiguration gc = gs.getDefaultConfiguration();

    BufferedImage bimage = gc.createCompatibleImage(100, 100, Transparency.OPAQUE);
  }
}

Create an image that supports arbitrary levels of transparency from GraphicsConfiguration

import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Transparency;
import java.awt.image.BufferedImage;
public class Main {
  public static void main(String[] argv) throws Exception {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice gs = ge.getDefaultScreenDevice();
    GraphicsConfiguration gc = gs.getDefaultConfiguration();
    BufferedImage bimage = gc.createCompatibleImage(100, 100, Transparency.TRANSLUCENT);
  }
}

Create an image that supports transparent pixels from GraphicsConfiguration

import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Transparency;
import java.awt.image.BufferedImage;
public class Main {
  public static void main(String[] argv) throws Exception {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice gs = ge.getDefaultScreenDevice();
    GraphicsConfiguration gc = gs.getDefaultConfiguration();
    BufferedImage bimage = gc.createCompatibleImage(100, 100, Transparency.BITMASK);
  }
}

Create buffered images that are compatible with the screen

import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Transparency;
import java.awt.image.BufferedImage;
public class Main {
  public static void main(String[] argv) throws Exception {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice gs = ge.getDefaultScreenDevice();
    GraphicsConfiguration gc = gs.getDefaultConfiguration();
    // Create an image that does not support transparency
    BufferedImage bimage = gc.createCompatibleImage(100, 100, Transparency.OPAQUE);
  }
}

Different buffer capabilities for each GraphicsConfiguration on each GraphicsDevice

/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/**
 * This test shows the different buffer capabilities for each
 * GraphicsConfiguration on each GraphicsDevice.
 */
import java.awt.BorderLayout;
import java.awt.BufferCapabilities;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.ImageCapabilities;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.BorderFactory;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/**
 * This class wraps a graphics configuration so that it can be displayed nicely
 * in components.
 */
class GCWrapper {
  private GraphicsConfiguration gc;
  private int index;
  public GCWrapper(GraphicsConfiguration gc, int index) {
    this.gc = gc;
    this.index = index;
  }
  public GraphicsConfiguration getGC() {
    return gc;
  }
  public String toString() {
    return gc.toString();
  }
}
/**
 * Main frame class.
 */
public class CapabilitiesTest extends JFrame implements ItemListener {
  private JComboBox gcSelection = new JComboBox();
  private JCheckBox imageAccelerated = new JCheckBox("Accelerated", false);
  private JCheckBox imageTrueVolatile = new JCheckBox("Volatile", false);
  private JCheckBox flipping = new JCheckBox("Flipping", false);
  private JLabel flippingMethod = new JLabel("");
  private JCheckBox fullScreen = new JCheckBox("Full Screen Only", false);
  private JCheckBox multiBuffer = new JCheckBox("Multi-Buffering", false);
  private JCheckBox fbAccelerated = new JCheckBox("Accelerated", false);
  private JCheckBox fbTrueVolatile = new JCheckBox("Volatile", false);
  private JCheckBox bbAccelerated = new JCheckBox("Accelerated", false);
  private JCheckBox bbTrueVolatile = new JCheckBox("Volatile", false);
  public CapabilitiesTest(GraphicsDevice dev) {
    super(dev.getDefaultConfiguration());
    addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent ev) {
        System.exit(0);
      }
    });
    initComponents(getContentPane());
    GraphicsConfiguration[] gcs = dev.getConfigurations();
    for (int i = 0; i < gcs.length; i++) {
      gcSelection.addItem(new GCWrapper(gcs[i], i));
    }
    gcSelection.addItemListener(this);
    gcChanged();
  }
  /**
   * Creates and lays out components in the container. See the comments below
   * for an organizational overview by panel.
   */
  private void initComponents(Container c) {
    c.setLayout(new BorderLayout());
    // Graphics Config
    JPanel gcPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
    c.add(gcPanel, BorderLayout.NORTH);
    gcSelection.setPreferredSize(new Dimension(400, 30));
    gcPanel.add(gcSelection);
    // Capabilities
    JPanel capsPanel = new JPanel(new BorderLayout());
    c.add(capsPanel, BorderLayout.CENTER);
    // Image Capabilities
    JPanel imageCapsPanel = new JPanel(new GridLayout(2, 1));
    capsPanel.add(imageCapsPanel, BorderLayout.NORTH);
    imageCapsPanel.setBorder(BorderFactory
        .createTitledBorder("Image Capabilities"));
    imageAccelerated.setEnabled(false);
    imageCapsPanel.add(imageAccelerated);
    imageTrueVolatile.setEnabled(false);
    imageCapsPanel.add(imageTrueVolatile);
    // Buffer Capabilities
    JPanel bufferCapsPanel = new JPanel(new BorderLayout());
    capsPanel.add(bufferCapsPanel, BorderLayout.CENTER);
    bufferCapsPanel.setBorder(BorderFactory
        .createTitledBorder("Buffer Capabilities"));
    // Buffer Access
    JPanel bufferAccessCapsPanel = new JPanel(new GridLayout(3, 1));
    bufferAccessCapsPanel.setPreferredSize(new Dimension(300, 88));
    bufferCapsPanel.add(bufferAccessCapsPanel, BorderLayout.NORTH);
    // Flipping
    JPanel flippingPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    bufferAccessCapsPanel.add(flippingPanel);
    flippingPanel.add(flipping);
    flipping.setEnabled(false);
    flippingPanel.add(flippingMethod);
    // Full-screen
    JPanel fsPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    bufferAccessCapsPanel.add(fsPanel);
    JPanel indentPanel = new JPanel();
    indentPanel.setPreferredSize(new Dimension(30, 30));
    fsPanel.add(indentPanel);
    fsPanel.add(fullScreen);
    fullScreen.setEnabled(false);
    // Multi-buffering
    JPanel mbPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    bufferAccessCapsPanel.add(mbPanel);
    indentPanel = new JPanel();
    indentPanel.setPreferredSize(new Dimension(30, 30));
    mbPanel.add(indentPanel);
    mbPanel.add(multiBuffer);
    multiBuffer.setEnabled(false);
    // Front and Back Buffer Capabilities
    JPanel buffersPanel = new JPanel(new GridLayout(1, 2));
    bufferCapsPanel.add(buffersPanel, BorderLayout.CENTER);
    // Front Buffer
    JPanel fbPanel = new JPanel(new GridLayout(2, 1));
    fbPanel.setBorder(BorderFactory.createTitledBorder("Front Buffer"));
    buffersPanel.add(fbPanel);
    fbPanel.add(fbAccelerated);
    fbAccelerated.setEnabled(false);
    fbPanel.add(fbTrueVolatile);
    fbTrueVolatile.setEnabled(false);
    // Back Buffer
    JPanel bbPanel = new JPanel(new GridLayout(2, 1));
    bbPanel.setPreferredSize(new Dimension(250, 80));
    bbPanel.setBorder(BorderFactory
        .createTitledBorder("Back and Intermediate Buffers"));
    buffersPanel.add(bbPanel);
    bbPanel.add(bbAccelerated);
    bbAccelerated.setEnabled(false);
    bbPanel.add(bbTrueVolatile);
    bbTrueVolatile.setEnabled(false);
  }
  public void itemStateChanged(ItemEvent ev) {
    gcChanged();
  }
  private void gcChanged() {
    GCWrapper wrap = (GCWrapper) gcSelection.getSelectedItem();
    // assert wrap != null;
    GraphicsConfiguration gc = wrap.getGC();
    // assert gc != null;
    // Image Caps
    ImageCapabilities imageCaps = gc.getImageCapabilities();
    imageAccelerated.setSelected(imageCaps.isAccelerated());
    imageTrueVolatile.setSelected(imageCaps.isTrueVolatile());
    // Buffer Caps
    BufferCapabilities bufferCaps = gc.getBufferCapabilities();
    flipping.setSelected(bufferCaps.isPageFlipping());
    flippingMethod.setText(getFlipText(bufferCaps.getFlipContents()));
    fullScreen.setSelected(bufferCaps.isFullScreenRequired());
    multiBuffer.setSelected(bufferCaps.isMultiBufferAvailable());
    // Front buffer caps
    imageCaps = bufferCaps.getFrontBufferCapabilities();
    fbAccelerated.setSelected(imageCaps.isAccelerated());
    fbTrueVolatile.setSelected(imageCaps.isTrueVolatile());
    imageCaps = bufferCaps.getFrontBufferCapabilities();
    // Back buffer caps
    imageCaps = bufferCaps.getBackBufferCapabilities();
    bbAccelerated.setSelected(imageCaps.isAccelerated());
    bbTrueVolatile.setSelected(imageCaps.isTrueVolatile());
  }
  private static String getFlipText(BufferCapabilities.FlipContents flip) {
    if (flip == null) {
      return "";
    } else if (flip == BufferCapabilities.FlipContents.UNDEFINED) {
      return "Method Unspecified";
    } else if (flip == BufferCapabilities.FlipContents.BACKGROUND) {
      return "Cleared to Background";
    } else if (flip == BufferCapabilities.FlipContents.PRIOR) {
      return "Previous Front Buffer";
    } else { // if (flip == BufferCapabilities.FlipContents.COPIED)
      return "Copied";
    }
  }
  public static void main(String[] args) {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice[] devices = ge.getScreenDevices();
    for (int i = 0; i < devices.length; i++) {
      CapabilitiesTest tst = new CapabilitiesTest(devices[i]);
      tst.pack();
      tst.setVisible(true);
    }
  }
}

Generates a table of all available display modes, enters full-screen mode and allows you to change the display mode

/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/*
 test @(#)DisplayModeTest.java 1.4 01/07/17
 @bug 4189326
 @summary Tests changing display mode
 @author martak@eng: area=FullScreen
 @ignore This test enters full-screen mode, if available, and should not
 be run as an applet or as part of the test harness.
 */
/**
 * This test generates a table of all available display modes, enters
 * full-screen mode, if available, and allows you to change the display mode.
 * The application should look fine under each enumerated display mode.
 * On UNIX, only a single display mode should be available, and on Microsoft
 * Windows, display modes should depend on direct draw availability and the
 * type of graphics card.
 */
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.DisplayMode;
import java.awt.FlowLayout;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
class DisplayModeModel extends DefaultTableModel {
  private DisplayMode[] modes;
  public DisplayModeModel(DisplayMode[] modes) {
    this.modes = modes;
  }
  public DisplayMode getDisplayMode(int r) {
    return modes[r];
  }
  public String getColumnName(int c) {
    return DisplayModeTest.COLUMN_NAMES[c];
  }
  public int getColumnCount() {
    return DisplayModeTest.COLUMN_WIDTHS.length;
  }
  public boolean isCellEditable(int r, int c) {
    return false;
  }
  public int getRowCount() {
    if (modes == null) {
      return 0;
    }
    return modes.length;
  }
  public Object getValueAt(int rowIndex, int colIndex) {
    DisplayMode dm = modes[rowIndex];
    switch (colIndex) {
    case DisplayModeTest.INDEX_WIDTH:
      return Integer.toString(dm.getWidth());
    case DisplayModeTest.INDEX_HEIGHT:
      return Integer.toString(dm.getHeight());
    case DisplayModeTest.INDEX_BITDEPTH: {
      int bitDepth = dm.getBitDepth();
      String ret;
      if (bitDepth == DisplayMode.BIT_DEPTH_MULTI) {
        ret = "Multi";
      } else {
        ret = Integer.toString(bitDepth);
      }
      return ret;
    }
    case DisplayModeTest.INDEX_REFRESHRATE: {
      int refreshRate = dm.getRefreshRate();
      String ret;
      if (refreshRate == DisplayMode.REFRESH_RATE_UNKNOWN) {
        ret = "Unknown";
      } else {
        ret = Integer.toString(refreshRate);
      }
      return ret;
    }
    }
    throw new ArrayIndexOutOfBoundsException("Invalid column value");
  }
}
public class DisplayModeTest extends JFrame implements ActionListener,
    ListSelectionListener {
  private boolean waiting = false;
  private GraphicsDevice device;
  private DisplayMode originalDM;
  private JButton exit = new JButton("Exit");
  private JButton changeDM = new JButton("Set Display");
  private JLabel currentDM = new JLabel();
  private JTable dmList = new JTable();
  private JScrollPane dmPane = new JScrollPane(dmList);
  private boolean isFullScreen = false;
  public static final int INDEX_WIDTH = 0;
  public static final int INDEX_HEIGHT = 1;
  public static final int INDEX_BITDEPTH = 2;
  public static final int INDEX_REFRESHRATE = 3;
  public static final int[] COLUMN_WIDTHS = new int[] { 100, 100, 100, 100 };
  public static final String[] COLUMN_NAMES = new String[] { "Width", "Height",
      "Bit Depth", "Refresh Rate" };
  public DisplayModeTest(GraphicsDevice device) {
    super(device.getDefaultConfiguration());
    this.device = device;
    setTitle("Display Mode Test");
    originalDM = device.getDisplayMode();
    setDMLabel(originalDM);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    // Make sure a DM is always selected in the list
    exit.addActionListener(this);
    changeDM.addActionListener(this);
    changeDM.setEnabled(device.isDisplayChangeSupported());
  }
  public void actionPerformed(ActionEvent ev) {
    Object source = ev.getSource();
    if (source == exit) {
      device.setDisplayMode(originalDM);
      System.exit(0);
    } else { // if (source == changeDM)
      int index = dmList.getSelectionModel().getAnchorSelectionIndex();
      if (index >= 0) {
        DisplayModeModel model = (DisplayModeModel) dmList.getModel();
        DisplayMode dm = model.getDisplayMode(index);
        device.setDisplayMode(dm);
        setDMLabel(dm);
        setSize(new Dimension(dm.getWidth(), dm.getHeight()));
        validate();
      }
    }
  }
  public void valueChanged(ListSelectionEvent ev) {
    changeDM.setEnabled(device.isDisplayChangeSupported());
  }
  private void initComponents(Container c) {
    setContentPane(c);
    c.setLayout(new BorderLayout());
    // Current DM
    JPanel currentPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
    c.add(currentPanel, BorderLayout.NORTH);
    JLabel current = new JLabel("Current Display Mode : ");
    currentPanel.add(current);
    currentPanel.add(currentDM);
    // Display Modes
    JPanel modesPanel = new JPanel(new GridLayout(1, 2));
    c.add(modesPanel, BorderLayout.CENTER);
    // List of display modes
    for (int i = 0; i < COLUMN_WIDTHS.length; i++) {
      TableColumn col = new TableColumn(i, COLUMN_WIDTHS[i]);
      col.setIdentifier(COLUMN_NAMES[i]);
      col.setHeaderValue(COLUMN_NAMES[i]);
      dmList.addColumn(col);
    }
    dmList.getSelectionModel().setSelectionMode(
        ListSelectionModel.SINGLE_SELECTION);
    dmList.getSelectionModel().addListSelectionListener(this);
    modesPanel.add(dmPane);
    // Controls
    JPanel controlsPanelA = new JPanel(new BorderLayout());
    modesPanel.add(controlsPanelA);
    JPanel controlsPanelB = new JPanel(new GridLayout(2, 1));
    controlsPanelA.add(controlsPanelB, BorderLayout.NORTH);
    // Exit
    JPanel exitPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
    controlsPanelB.add(exitPanel);
    exitPanel.add(exit);
    // Change DM
    JPanel changeDMPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
    controlsPanelB.add(changeDMPanel);
    changeDMPanel.add(changeDM);
    controlsPanelA.add(new JPanel(), BorderLayout.CENTER);
  }
  public void setVisible(boolean isVis) {
    super.setVisible(isVis);
    if (isVis) {
      dmList.setModel(new DisplayModeModel(device.getDisplayModes()));
    }
  }
  public void setDMLabel(DisplayMode newMode) {
    int bitDepth = newMode.getBitDepth();
    int refreshRate = newMode.getRefreshRate();
    String bd, rr;
    if (bitDepth == DisplayMode.BIT_DEPTH_MULTI) {
      bd = "Multi";
    } else {
      bd = Integer.toString(bitDepth);
    }
    if (refreshRate == DisplayMode.REFRESH_RATE_UNKNOWN) {
      rr = "Unknown";
    } else {
      rr = Integer.toString(refreshRate);
    }
    currentDM.setText(COLUMN_NAMES[INDEX_WIDTH] + ": " + newMode.getWidth()
        + " " + COLUMN_NAMES[INDEX_HEIGHT] + ": " + newMode.getHeight() + " "
        + COLUMN_NAMES[INDEX_BITDEPTH] + ": " + bd + " "
        + COLUMN_NAMES[INDEX_REFRESHRATE] + ": " + rr);
  }
  public void begin() {
    isFullScreen = device.isFullScreenSupported();
    setUndecorated(isFullScreen);
    setResizable(!isFullScreen);
    if (isFullScreen) {
      // Full-screen mode
      device.setFullScreenWindow(this);
      validate();
    } else {
      // Windowed mode
      pack();
      setVisible(true);
    }
  }
  public static void main(String[] args) {
    GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice[] devices = env.getScreenDevices();
    // REMIND : Multi-monitor full-screen mode not yet supported
    for (int i = 0; i < 1 /* devices.length */; i++) {
      DisplayModeTest test = new DisplayModeTest(devices[i]);
      test.initComponents(test.getContentPane());
      test.begin();
    }
  }
}

Get all fonts

import java.awt.Font;
import java.awt.GraphicsEnvironment;
public class Main {
  public static void main(String[] args) throws Exception {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    Font[] fonts = ge.getAllFonts();
    for (int i = 0; i < fonts.length; i++) {
      System.out.print(fonts[i].getFontName() + " : ");
      System.out.print(fonts[i].getFamily() + " : ");
      System.out.print(fonts[i].getName());
      System.out.println();
    }
  }
}

Get the available font family names

import java.awt.GraphicsEnvironment;
public class Main {
  public static void main(String[] args) {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    String familyNames[] = ge.getAvailableFontFamilyNames();
    for (String familyName : familyNames) {
      System.out.println("Family names: " + familyName);
    }
  }
}

Getting Amount of Free Accelerated Image Memory

import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.image.VolatileImage;
public class Main {
  public static void main(String[] argv) throws Exception {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice[] gs = ge.getScreenDevices();
    for (int i = 0; i < gs.length; i++) {
      VolatileImage im = gs[i].getDefaultConfiguration()
          .createCompatibleVolatileImage(1, 1);
      int bytes = gs[i].getAvailableAcceleratedMemory();
      if (bytes < 0) {
        System.out.println("Amount of memory is unlimited");
      }
      im.flush();
    }
  }
}

Getting Number of Colors

import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
public class Main {
  public static void main(String[] argv) throws Exception {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice gs = ge.getDefaultScreenDevice();
    DisplayMode[] dmodes = gs.getDisplayModes();
    for (int i = 0; i < dmodes.length; i++) {
      int refreshRate = dmodes[i].getRefreshRate();
    }
  }
}

Getting Refresh Rates

import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
public class Main {
  public static void main(String[] argv) throws Exception {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice gs = ge.getDefaultScreenDevice();
    DisplayMode[] dmodes = gs.getDisplayModes();
    for (int i = 0; i < dmodes.length; i++) {
      int bitDepth = dmodes[i].getBitDepth();
    }
  }
}

Getting Screen Sizes

import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
public class Main {
  public static void main(String[] argv) throws Exception {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice gs = ge.getDefaultScreenDevice();
    DisplayMode[] dmodes = gs.getDisplayModes();
    for (int i = 0; i < dmodes.length; i++) {
      int screenWidth = dmodes[i].getWidth();
      int screenHeight = dmodes[i].getHeight();
    }
  }
}

Getting the Current Screen Refresh Rate and Number of Colors

import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
public class Main {
  public static void main(String[] argv) throws Exception {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice[] gs = ge.getScreenDevices();
    for (int i = 0; i < gs.length; i++) {
      DisplayMode dm = gs[i].getDisplayMode();
       int refreshRate = dm.getRefreshRate();
      if (refreshRate == DisplayMode.REFRESH_RATE_UNKNOWN) {
        System.out.println("Unknown rate"); 
      }
      int bitDepth = dm.getBitDepth();
      int numColors = (int) Math.pow(2, bitDepth);
    }
  }
}

Getting the Font Faces for a Font Family

import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class Main {
  public static void main(String[] argv) throws Exception {
    Map<String, List<String>> fontFaceNames = new HashMap<String, List<String>>();
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    Font[] fonts = ge.getAllFonts();
    for (int i = 0; i < fonts.length; i++) {
      String familyName = fonts[i].getFamily();
      String faceName = fonts[i].getName();
      List<String> list = fontFaceNames.get(familyName);
      if (list == null) {
        list = new ArrayList<String>();
        fontFaceNames.put(familyName, list);
      }
      list.add(faceName);
    }
    System.out.println(fontFaceNames);
  }
}

If more than one screen is available, gets the size of each screen

import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
public class Main {
  public static void main(String[] argv) throws Exception {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice[] gs = ge.getScreenDevices();
    for (int i = 0; i < gs.length; i++) {
      DisplayMode dm = gs[i].getDisplayMode();
      int screenWidth = dm.getWidth();
      int screenHeight = dm.getHeight();
    }
  }
}

List all fonts system installed

import java.awt.Font;
import java.awt.GraphicsEnvironment;
public class ShowFonts {
  public static void main(String[] args) {
    Font[] fonts;
    fonts = GraphicsEnvironment.getLocalGraphicsEnvironment().getAllFonts();
    for (int i = 0; i < fonts.length; i++) {
      System.out.print(fonts[i].getFontName() + " : ");
      System.out.print(fonts[i].getFamily() + " : ");
      System.out.print(fonts[i].getName());
      System.out.println();
    }
  }
}

Retrieve and print the graphic device information

import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
public class Main {
  public static void main(String[] args) {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice[] gs = ge.getScreenDevices();
    for (int j = 0; j < gs.length; j++) {
      GraphicsDevice gd = gs[j];
      System.out.println("Device " + j + ": " + gd);
      GraphicsConfiguration[] gc = gd.getConfigurations();
      for (int i = 0; i < gc.length; i++) {
        System.out.println(gc[i]);
        System.out.println(gc[i].getBounds());
      }
    }
  }
}

Setting the Screen Size, Refresh Rate, or Number of Colors

import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
public class Main {
  public static void main(String[] argv) throws Exception {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice gs = ge.getDefaultScreenDevice();
    boolean canChg = gs.isDisplayChangeSupported();
    if (canChg) {
      DisplayMode displayMode = gs.getDisplayMode();
      int screenWidth = 640;
      int screenHeight = 480;
      int bitDepth = 8;
      displayMode = new DisplayMode(screenWidth, screenHeight, bitDepth, displayMode
          .getRefreshRate());
      try {
        gs.setDisplayMode(displayMode);
      } catch (Throwable e) {
        gs.setFullScreenWindow(null);
      }
    }
  }
}