Java/Development Class/OS — различия между версиями

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Текущая версия на 07:00, 1 июня 2010

Class representing a standard operating system platform, WIN, MAC, or POSIX.

   
/*
 *  OS.java
 *  2007-04-14
 */
//cb.aloe.util;
import java.io.File;
import java.util.ArrayList;
/**
 * Class representing a standard operating system platform, WIN, MAC, or POSIX.
 * 
 * @author Christopher Bach
 */
public final class OS {
  public static final OS WIN = new OS("WIN");
  public static final OS MAC = new OS("MAC");
  public static final OS POSIX = new OS("POSIX");
  private String ourOS = "";
  /**
   * Private constructor to avert instantiation.
   */
  private OS(String os) {
    ourOS = os;
  }
  /**
   * Returns a String representing this OS object.
   */
  public String toString() {
    return ourOS;
  }
  /**
   * Returns the first readable and writable application data folder appropriate
   * to this OS.
   */
  public static File getAppDataFolder() {
    File[] folders = listAppDataFolders();
    for (int i = 0; i < folders.length; i++) {
      File folder = folders[i];
      if (folder.canRead() && folder.canWrite())
        return folder;
    }
    return null;
  }
  /**
   * Returns the first readable and writable user data folder appropriate to
   * this OS.
   */
  public static File getUserDataFolder() {
    File[] folders = listUserDataFolders();
    for (int i = 0; i < folders.length; i++) {
      File folder = folders[i];
      if (folder.canRead() && folder.canWrite())
        return folder;
    }
    return null;
  }
  /**
   * Returns a list of the preferred locations for storing application- specific
   * data in descending order.
   */
  public static File[] listAppDataFolders() {
    String home = System.getProperty("user.home");
    ArrayList folders = new ArrayList();
    if (isWinNT()) // NT/2000/XP
    {
      // C:\Documents and Settings\All Users\Application Data
      // Surmise that the "All Users" folder will be a child of the
      // parent of the current user"s home folder:
      File folder = new File(home).getParentFile();
      folders.add(new File(folder, "All Users\\Application Data"));
    }
    else if (isWin9X()) // 95/98/ME
    {
      // C:\Windows
      folders.add(new File(home));
    }
    else if (isVista()) {
      // C:\ProgramData
      File folder = new File(home).getParentFile().getParentFile();
      folders.add(new File(folder, "ProgramData"));
      // C:\Users\Public\AppData
      folder = new File(home).getParentFile();
      folders.add(new File(folder, "Public\\AppData"));
    }
    else if (isMac()) {
      folders.add(new File("/Library/Application Support"));
    }
    else {
      folders.add(new File("/var/local"));
      folders.add(new File("/var"));
    }
    // folders.addAll(Arrays.asList(listUserDataFolders()));
    File[] files = new File[folders.size()];
    return (File[]) folders.toArray(files);
  }
  /**
   * Returns a list of the preferred locations for storing user- specific data
   * in descending order.
   */
  public static File[] listUserDataFolders() {
    String home = System.getProperty("user.home");
    ArrayList folders = new ArrayList();
    if (isWinNT()) {
      folders.add(new File(home + "\\Application Data"));
      folders.add(new File(home + "\\Local Settings\\Application Data"));
    }
    else if (isVista()) {
      folders.add(new File(home + "\\AppData"));
      folders.add(new File(home + "\\AppData\\Local"));
    }
    else if (isMac()) {
      folders.add(new File(home + "/Library/Application Support"));
    }
    folders.add(new File(home));
    File[] files = new File[folders.size()];
    return (File[]) folders.toArray(files);
  }
  /**
   * Returns the name of the current operating system platform as listed in the
   * System properties.
   */
  public static final String getOSName() {
    return System.getProperty("os.name");
  }
  /**
   * Returns the OS representing the current operating system platform.
   */
  public static final OS getOS() {
    String os = System.getProperty("os.name").toLowerCase();
    if (os.indexOf("windows") >= 0)
      return WIN;
    else if (os.indexOf("mac os") >= 0)
      return MAC;
    else
      return POSIX;
  }
  /**
   * Returns whether or not the current operating system is a Microsoft Windows
   * platform.
   */
  public static final boolean isWindows() {
    return getOS() == WIN;
  }
  /**
   * Returns whether or not the current operating system is a Microsoft Windows
   * 9X platform (Windows 95/98/ME).
   */
  public static boolean isWin9X() {
    if (getOS() != WIN)
      return false;
    String os = getOSName();
    if (os.indexOf("95") >= 0 || os.indexOf("98") >= 0 || os.indexOf("me") >= 0)
      return true;
    return false;
  }
  /**
   * Returns whether or not the current operating system is a Microsoft Windows
   * NT platform (Windows NT/2000/2003/XP).
   */
  public static boolean isWinNT() {
    if (getOS() != WIN)
      return false;
    String os = getOSName();
    if (os.indexOf("NT") >= 0 || os.indexOf("2000") >= 0 || os.indexOf("2003") >= 0
        || os.indexOf("XP") >= 0)
      return true;
    return false;
  }
  /**
   * Returns whether or not the current operating system is a Microsoft Windows
   * Vista platform.
   */
  public static boolean isVista() {
    if (getOS() != WIN)
      return false;
    String os = getOSName();
    return (os.indexOf("Vista") >= 0);
  }
  /**
   * Returns whether or not the current operating system is the Apple Macintosh
   * OS X platform.
   */
  public static final boolean isMac() {
    return getOS() == MAC;
  }
  /**
   * Returns whether or not the current operating system is a Posix-compatible
   * platform (Unix, Linux, Solaris, etc).
   */
  public static final boolean isPosix() {
    return getOS() == POSIX;
  }
}





Class to help determining the OS

   
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Set;
/**
 * Class to help determining the OS.
 *
 * @author 
 * @version $Revision: 480428 $ $Date: 2006-11-29 07:15:24 +0100 (Mi, 29 Nov 2006) $
 */
 final class OsFamily
{
    private final String name;
    private final OsFamily[] families;
    OsFamily(final String name)
    {
        this.name = name;
        families = new OsFamily[0];
    }
    OsFamily(final String name, final OsFamily[] families)
    {
        this.name = name;
        this.families = families;
    }
    /**
     * Returns the name of this family.
     */
    public String getName()
    {
        return name;
    }
    /**
     * Returns the OS families that this family belongs to.
     */
    public OsFamily[] getFamilies()
    {
        return families;
    }
}





Condition that tests the OS type.

   
/* 
 * Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

import java.util.Locale;
/**
 * Condition that tests the OS type.
 */
public final class OS {
    private static final String FAMILY_OS_400 = "os/400";
    private static final String FAMILY_Z_OS = "z/os";
    private static final String FAMILY_WIN9X = "win9x";
    private static final String FAMILY_OPENVMS = "openvms";
    private static final String FAMILY_UNIX = "unix";
    private static final String FAMILY_TANDEM = "tandem";
    private static final String FAMILY_MAC = "mac";
    private static final String FAMILY_DOS = "dos";
    private static final String FAMILY_NETWARE = "netware";
    private static final String FAMILY_OS_2 = "os/2";
    private static final String FAMILY_WINDOWS = "windows";
    private static final String OS_NAME = System.getProperty("os.name")
            .toLowerCase(Locale.US);
    private static final String OS_ARCH = System.getProperty("os.arch")
            .toLowerCase(Locale.US);
    private static final String OS_VERSION = System.getProperty("os.version")
            .toLowerCase(Locale.US);
    private static final String PATH_SEP = System.getProperty("path.separator");
    /**
     * Default constructor
     */
    private OS() {
    }
    /**
     * Determines if the OS on which Ant is executing matches the given OS
     * family. * Possible values:<br />
     * <ul>
     * <li>dos</li>
     * <li>mac</li>
     * <li>netware</li>
     * <li>os/2</li>
     * <li>tandem</li>
     * <li>unix</li>
     * <li>windows</li>
     * <li>win9x</li>
     * <li>z/os</li>
     * <li>os/400</li>
     * </ul>
     * 
     * @param family
     *            the family to check for
     * @return true if the OS matches
     */
    private static boolean isFamily(final String family) {
        return isOs(family, null, null, null);
    }
    public static boolean isFamilyDOS() {
        return isFamily(FAMILY_DOS);
    }
    public static boolean isFamilyMac() {
        return isFamily(FAMILY_MAC);
    }
    public static boolean isFamilyNetware() {
        return isFamily(FAMILY_NETWARE);
    }
    public static boolean isFamilyOS2() {
        return isFamily(FAMILY_OS_2);
    }
    public static boolean isFamilyTandem() {
        return isFamily(FAMILY_TANDEM);
    }
    public static boolean isFamilyUnix() {
        return isFamily(FAMILY_UNIX);
    }
    public static boolean isFamilyWindows() {
        return isFamily(FAMILY_WINDOWS);
    }
    public static boolean isFamilyWin9x() {
        return isFamily(FAMILY_WIN9X);
    }
    public static boolean isFamilyZOS() {
        return isFamily(FAMILY_Z_OS);
    }
    public static boolean isFamilyOS400() {
        return isFamily(FAMILY_OS_400);
    }
    public static boolean isFamilyOpenVms() {
        return isFamily(FAMILY_OPENVMS);
    }
    /**
     * Determines if the OS on which Ant is executing matches the given OS name.
     * 
     * @param name
     *            the OS name to check for
     * @return true if the OS matches
     */
    public static boolean isName(final String name) {
        return isOs(null, name, null, null);
    }
    /**
     * Determines if the OS on which Ant is executing matches the given OS
     * architecture.
     * 
     * @param arch
     *            the OS architecture to check for
     * @return true if the OS matches
     */
    public static boolean isArch(final String arch) {
        return isOs(null, null, arch, null);
    }
    /**
     * Determines if the OS on which Ant is executing matches the given OS
     * version.
     * 
     * @param version
     *            the OS version to check for
     * @return true if the OS matches
     */
    public static boolean isVersion(final String version) {
        return isOs(null, null, null, version);
    }
    /**
     * Determines if the OS on which Ant is executing matches the given OS
     * family, name, architecture and version
     * 
     * @param family
     *            The OS family
     * @param name
     *            The OS name
     * @param arch
     *            The OS architecture
     * @param version
     *            The OS version
     * @return true if the OS matches
     */
    public static boolean isOs(final String family, final String name,
            final String arch, final String version) {
        boolean retValue = false;
        if (family != null || name != null || arch != null || version != null) {
            boolean isFamily = true;
            boolean isName = true;
            boolean isArch = true;
            boolean isVersion = true;
            if (family != null) {
                if (family.equals(FAMILY_WINDOWS)) {
                    isFamily = OS_NAME.indexOf(FAMILY_WINDOWS) > -1;
                } else if (family.equals(FAMILY_OS_2)) {
                    isFamily = OS_NAME.indexOf(FAMILY_OS_2) > -1;
                } else if (family.equals(FAMILY_NETWARE)) {
                    isFamily = OS_NAME.indexOf(FAMILY_NETWARE) > -1;
                } else if (family.equals(FAMILY_DOS)) {
                    isFamily = PATH_SEP.equals(";")
                            && !isFamily(FAMILY_NETWARE);
                } else if (family.equals(FAMILY_MAC)) {
                    isFamily = OS_NAME.indexOf(FAMILY_MAC) > -1;
                } else if (family.equals(FAMILY_TANDEM)) {
                    isFamily = OS_NAME.indexOf("nonstop_kernel") > -1;
                } else if (family.equals(FAMILY_UNIX)) {
                    isFamily = PATH_SEP.equals(":")
                            && !isFamily(FAMILY_OPENVMS)
                            && (!isFamily(FAMILY_MAC) || OS_NAME.endsWith("x"));
                } else if (family.equals(FAMILY_WIN9X)) {
                    isFamily = isFamily(FAMILY_WINDOWS)
                            && (OS_NAME.indexOf("95") >= 0
                                    || OS_NAME.indexOf("98") >= 0
                                    || OS_NAME.indexOf("me") >= 0 || OS_NAME
                                    .indexOf("ce") >= 0);
                } else if (family.equals(FAMILY_Z_OS)) {
                    isFamily = OS_NAME.indexOf(FAMILY_Z_OS) > -1
                            || OS_NAME.indexOf("os/390") > -1;
                } else if (family.equals(FAMILY_OS_400)) {
                    isFamily = OS_NAME.indexOf(FAMILY_OS_400) > -1;
                } else if (family.equals(FAMILY_OPENVMS)) {
                    isFamily = OS_NAME.indexOf(FAMILY_OPENVMS) > -1;
                } else {
                    throw new IllegalArgumentException(
                            "Don\"t know how to detect os family \"" + family
                                    + "\"");
                }
            }
            if (name != null) {
                isName = name.equals(OS_NAME);
            }
            if (arch != null) {
                isArch = arch.equals(OS_ARCH);
            }
            if (version != null) {
                isVersion = version.equals(OS_VERSION);
            }
            retValue = isFamily && isName && isArch && isVersion;
        }
        return retValue;
    }
}





Get OS

   
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 *
 * Contributor(s):
 *
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don"t indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */
/*
 * OS.java
 *
 * Created on December 8, 2001, 5:48 PM
 */

import java.io.File;
/**
 *
 * @author  bnevins
 * @version
 */
public class OS
{
    private OS()
    {
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isWindows()
    {
        return File.separatorChar == "\\";
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isUNIX()
    {
        return File.separatorChar == "/";
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isUnix()
    {
        // convenience method...
        return isUNIX();
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isSun()
    {
        return isName("sun");
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isSolaris10()
    {
        return isSun() && isVersion("5.10");
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isSunSparc()
    {
        return isName("sun") && isArch("sparc");
    }
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isSunX86()
    {
        return isName("sun") && isArch("x86");
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isLinux()
    {
        return isName("linux");
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isDarwin()
    {
        return isName("Mac OS X");
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isWindowsForSure()
    {
        return isName("windows") && isWindows();
    }
    ///////////////////////////////////////////////////////////////////////////
    //  There are 10 known Linux versions!
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isDebianLinux()
    {
        return isLinux() && new File("/etc/debian_version").exists();
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isFedoraLinux()
    {
        return isLinux() && new File("/etc/fedora-release").exists();
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isGentooLinux()
    {
        return isLinux() && new File("/etc/gentoo-release").exists();
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isKnoppixLinux()
    {
        return isLinux() && new File("/etc/knoppix_version").exists();
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isMandrakeLinux()
    {
        return isLinux() && new File("/etc/mandrake-release").exists();
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isMandrivaLinux()
    {
        return isLinux() && new File("/etc/mandriva-release").exists();
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isRedHatLinux()
    {
        return isLinux() && new File("/etc/redhat-release").exists();
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isSlackwareLinux()
    {
        return isLinux() && new File("/etc/slackware-version").exists();
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isSuSELinux()
    {
        return isLinux() && new File("/etc/SuSE-release").exists();
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static boolean isUbuntuLinux()
    {
        return isLinux() && new File("/etc/lsb-release").exists();
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    private static boolean isArch(String name)
    {
        String archname = System.getProperty("os.arch");
        
        if(archname == null || archname.length() <= 0)
            return false;
        
        // case insensitive compare...
        archname= archname.toLowerCase();
        name= name.toLowerCase();
        
        if(archname.indexOf(name) >= 0)
            return true;
        
        return false;
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    private static boolean isName(String name)
    {
        String osname = System.getProperty("os.name");
        
        if(osname == null || osname.length() <= 0)
            return false;
        
        // case insensitive compare...
        osname  = osname.toLowerCase();
        name  = name.toLowerCase();
        
        if(osname.indexOf(name) >= 0)
            return true;
        
        return false;
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    private static boolean isVersion(String version)
    {
        String osversion = System.getProperty("os.version");
        
        if(osversion == null || osversion.length() <= 0 || version == null || version.length() <= 0 )
            return false;
        
        if(osversion.equals(version))
            return true;
        
        return false;
    }
    
    ///////////////////////////////////////////////////////////////////////////
    
    public static final String WINDOWS_BATCH_FILE_EXTENSION = ".bat";
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[])
    {
        System.out.println("os.version = "                  + System.getProperty("os.version"));
        System.out.println("os.name = "                     + System.getProperty("os.name"));
        System.out.println("os.arch = "                     + System.getProperty("os.arch"));
        System.out.println("isUNIX() returned: "            + isUNIX());
        System.out.println("isWindows() returned: "         + isWindows());
        System.out.println("isWindowsForSure() returned: "  + isWindowsForSure());
        System.out.println("isSun() returned: "             + isSun());
        System.out.println("isLinux() returned: "           + isLinux());
        System.out.println("isDebianLinux() returned: "     + isDebianLinux());
        System.out.println("isFedoraLinux() returned: "     + isFedoraLinux());
        System.out.println("isGentooLinux() returned: "     + isGentooLinux());
        System.out.println("isKnoppixLinux() returned: "    + isKnoppixLinux());
        System.out.println("isMandrakeLinux() returned: "   + isMandrakeLinux());
        System.out.println("isMandrivaLinux() returned: "   + isMandrivaLinux());
        System.out.println("isRedHatLinux() returned: "     + isRedHatLinux());
        System.out.println("isSlackwareLinux() returned: "  + isSlackwareLinux());
        System.out.println("isSuSELinux() returned: "       + isSuSELinux());
        System.out.println("isUbuntuLinux() returned: "     + isUbuntuLinux());
        System.out.println("isSunX86() returned: "          + isSunX86());
        System.out.println("isSunSparc() returned: "        + isSunSparc());
        System.out.println("isDarwin() returned: "          + isDarwin());
        System.out.println("isSolaris10() returned: "       + isSolaris10());
    }
}





Get the operating system

  
/*
 * $Id: Utilities.java,v 1.11 2008/10/14 22:31:46 rah003 Exp $
 *
 * Copyright 2006 Sun Microsystems, Inc., 4150 Network Circle,
 * Santa Clara, California 95054, U.S.A. All rights reserved.
 *
 * 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 St, Fifth Floor, Boston, MA  02110-1301  USA
 */

import java.awt.ruponent;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsEnvironment;
import java.awt.Insets;
import java.awt.KeyboardFocusManager;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.Window;
import java.awt.event.KeyEvent;
import java.lang.ref.Reference;
import java.lang.ref.SoftReference;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.text.BreakIterator;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Locale;
import java.util.NoSuchElementException;
import java.util.StringTokenizer;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.KeyStroke;
import javax.swing.SwingUtilities;
/**
 * Contribution from NetBeans: Issue #319-swingx.
 * <p>
 * 
 * PENDING: need to reconcile with OS, JVM... added as-is because needed the
 * shortcut handling to fix #
 * 
 * @author apple
 */
public class Utilities {
    private Utilities() {
    }
    
    private static final int CTRL_WILDCARD_MASK = 32768;
    private static final int ALT_WILDCARD_MASK = CTRL_WILDCARD_MASK * 2;
    
    /** Operating system is Windows NT. */
    public static final int OS_WINNT = 1 << 0;
    /** Operating system is Windows 95. */
    public static final int OS_WIN95 = OS_WINNT << 1;
    /** Operating system is Windows 98. */
    public static final int OS_WIN98 = OS_WIN95 << 1;
    /** Operating system is Solaris. */
    public static final int OS_SOLARIS = OS_WIN98 << 1;
    /** Operating system is Linux. */
    public static final int OS_LINUX = OS_SOLARIS << 1;
    /** Operating system is HP-UX. */
    public static final int OS_HP = OS_LINUX << 1;
    /** Operating system is IBM AIX. */
    public static final int OS_AIX = OS_HP << 1;
    /** Operating system is SGI IRIX. */
    public static final int OS_IRIX = OS_AIX << 1;
    /** Operating system is Sun OS. */
    public static final int OS_SUNOS = OS_IRIX << 1;
    /** Operating system is Compaq TRU64 Unix */
    public static final int OS_TRU64 = OS_SUNOS << 1;
    /** Operating system is OS/2. */
    public static final int OS_OS2 = OS_TRU64 << 2;
    /** Operating system is Mac. */
    public static final int OS_MAC = OS_OS2 << 1;
    /** Operating system is Windows 2000. */
    public static final int OS_WIN2000 = OS_MAC << 1;
    /** Operating system is Compaq OpenVMS */
    public static final int OS_VMS = OS_WIN2000 << 1;
    /**
     *Operating system is one of the Windows variants but we don"t know which
     *one it is
     */
    public static final int OS_WIN_OTHER = OS_VMS << 1;
    /** Operating system is unknown. */
    public static final int OS_OTHER = OS_WIN_OTHER << 1;
    /** Operating system is FreeBSD
     * @since 4.50
     */
    public static final int OS_FREEBSD = OS_OTHER << 1;
    /** A mask for Windows platforms. */
    public static final int OS_WINDOWS_MASK = OS_WINNT | OS_WIN95 | OS_WIN98 | OS_WIN2000 | OS_WIN_OTHER;
    /** A mask for Unix platforms. */
    public static final int OS_UNIX_MASK = OS_SOLARIS | OS_LINUX | OS_HP | OS_AIX | OS_IRIX | OS_SUNOS | OS_TRU64 |
        OS_MAC | OS_FREEBSD;
    /** A height of the windows"s taskbar */
    public static final int TYPICAL_WINDOWS_TASKBAR_HEIGHT = 27;
    /** A height of the Mac OS X"s menu */
    private static final int TYPICAL_MACOSX_MENU_HEIGHT = 24;
    
    private static int operatingSystem = -1;
    
    /** reference to map that maps allowed key names to their values (String, Integer)
    and reference to map for mapping of values to their names */
    private static Reference<Object> namesAndValues;
    /** Get the operating system.
    * @return one of the <code>OS_*</code> constants (such as {@link #OS_WINNT})
    */
    public static int getOperatingSystem() {
        if (operatingSystem == -1) {
            String osName = System.getProperty("os.name");
            if ("Windows NT".equals(osName)) { // NOI18N
                operatingSystem = OS_WINNT;
            } else if ("Windows 95".equals(osName)) { // NOI18N
                operatingSystem = OS_WIN95;
            } else if ("Windows 98".equals(osName)) { // NOI18N
                operatingSystem = OS_WIN98;
            } else if ("Windows 2000".equals(osName)) { // NOI18N
                operatingSystem = OS_WIN2000;
            } else if (osName.startsWith("Windows ")) { // NOI18N
                operatingSystem = OS_WIN_OTHER;
            } else if ("Solaris".equals(osName)) { // NOI18N
                operatingSystem = OS_SOLARIS;
            } else if (osName.startsWith("SunOS")) { // NOI18N
                operatingSystem = OS_SOLARIS;
            }
            // JDK 1.4 b2 defines os.name for me as "Redhat Linux" -jglick
            else if (osName.endsWith("Linux")) { // NOI18N
                operatingSystem = OS_LINUX;
            } else if ("HP-UX".equals(osName)) { // NOI18N
                operatingSystem = OS_HP;
            } else if ("AIX".equals(osName)) { // NOI18N
                operatingSystem = OS_AIX;
            } else if ("Irix".equals(osName)) { // NOI18N
                operatingSystem = OS_IRIX;
            } else if ("SunOS".equals(osName)) { // NOI18N
                operatingSystem = OS_SUNOS;
            } else if ("Digital UNIX".equals(osName)) { // NOI18N
                operatingSystem = OS_TRU64;
            } else if ("OS/2".equals(osName)) { // NOI18N
                operatingSystem = OS_OS2;
            } else if ("OpenVMS".equals(osName)) { // NOI18N
                operatingSystem = OS_VMS;
            } else if (osName.equals("Mac OS X")) { // NOI18N
                operatingSystem = OS_MAC;
            } else if (osName.startsWith("Darwin")) { // NOI18N
                operatingSystem = OS_MAC;
            } else if (osName.toLowerCase(Locale.US).startsWith("freebsd")) { // NOI18N 
                operatingSystem = OS_FREEBSD;
            } else {
                operatingSystem = OS_OTHER;
            }
        }
        return operatingSystem;
    }
    
    /** Test whether NetBeans is running on some variant of Windows.
    * @return <code>true</code> if Windows, <code>false</code> if some other manner of operating system
    */
    public static boolean isWindows() {
        return (getOperatingSystem() & OS_WINDOWS_MASK) != 0;
    }
    /** Test whether NetBeans is running on some variant of Unix.
    * Linux is included as well as the commercial vendors, and Mac OS X.
    * @return <code>true</code> some sort of Unix, <code>false</code> if some other manner of operating system
    */
    public static boolean isUnix() {
        return (getOperatingSystem() & OS_UNIX_MASK) != 0;
    }
    
    /** Test whether the operating system supports icons on frames (windows).
    * @return <code>true</code> if it does <em>not</em>
    *
    */
    public static boolean isLargeFrameIcons() {
        return (getOperatingSystem() == OS_SOLARIS) || (getOperatingSystem() == OS_HP);
    }
    /**
     * Finds out the monitor where the user currently has the input focus.
     * This method is usually used to help the client code to figure out on
     * which monitor it should place newly created windows/frames/dialogs.
     *
     * @return the GraphicsConfiguration of the monitor which currently has the
     * input focus
     */
    private static GraphicsConfiguration getCurrentGraphicsConfiguration() {
        Component focusOwner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
        if (focusOwner != null) {
            Window w = SwingUtilities.getWindowAncestor(focusOwner);
            if (w != null) {
                return w.getGraphicsConfiguration();
            }
        }
        return GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
    }
    /**
     * Returns the usable area of the screen where applications can place its
     * windows.  The method subtracts from the screen the area of taskbars,
     * system menus and the like.  The screen this method applies to is the one
     * which is considered current, ussually the one where the current input
     * focus is.
     *
     * @return the rectangle of the screen where one can place windows
     *
     * @since 2.5
     */
    public static Rectangle getUsableScreenBounds() {
        return getUsableScreenBounds(getCurrentGraphicsConfiguration());
    }
    /**
     * Returns the usable area of the screen where applications can place its
     * windows.  The method subtracts from the screen the area of taskbars,
     * system menus and the like.
     *
     * @param gconf the GraphicsConfiguration of the monitor
     * @return the rectangle of the screen where one can place windows
     *
     * @since 2.5
     */
    public static Rectangle getUsableScreenBounds(GraphicsConfiguration gconf) {
        if (gconf == null) {
            gconf = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
        }
        Rectangle bounds = new Rectangle(gconf.getBounds());
        String str;
        str = System.getProperty("netbeans.screen.insets"); // NOI18N
        if (str != null) {
            StringTokenizer st = new StringTokenizer(str, ", "); // NOI18N
            if (st.countTokens() == 4) {
                try {
                    bounds.y = Integer.parseInt(st.nextToken());
                    bounds.x = Integer.parseInt(st.nextToken());
                    bounds.height -= (bounds.y + Integer.parseInt(st.nextToken()));
                    bounds.width -= (bounds.x + Integer.parseInt(st.nextToken()));
                } catch (NumberFormatException ex) {
                    Logger.getAnonymousLogger().log(Level.WARNING, null, ex);
                }
            }
            return bounds;
        }
        str = System.getProperty("netbeans.taskbar.height"); // NOI18N
        if (str != null) {
            bounds.height -= Integer.getInteger(str, 0).intValue();
            return bounds;
        }
        try {
            Toolkit toolkit = Toolkit.getDefaultToolkit();
            Insets insets = toolkit.getScreenInsets(gconf);
            bounds.y += insets.top;
            bounds.x += insets.left;
            bounds.height -= (insets.top + insets.bottom);
            bounds.width -= (insets.left + insets.right);
        } catch (Exception ex) {
            Logger.getAnonymousLogger().log(Level.WARNING, null, ex);
        }
        return bounds;
    }
    
    /** Initialization of the names and values
    * @return array of two hashmaps first maps
    *   allowed key names to their values (String, Integer)
    *  and second
    * hashtable for mapping of values to their names (Integer, String)
    */
    private static synchronized HashMap[] initNameAndValues() {
        if (namesAndValues != null) {
            HashMap[] arr = (HashMap[]) namesAndValues.get();
            if (arr != null) {
                return arr;
            }
        }
        Field[] fields;
        // JW - fix Issue #353-swingx: play nicer inside sandbox.
        try {
            fields = KeyEvent.class.getDeclaredFields();
//           fields = KeyEvent.class.getFields();
        } catch (SecurityException e) { 
            // JW: need to do better? What are the use-cases where we don"t have
            // any access to the fields?
            fields = new Field[0];
        }
        HashMap<String,Integer> names = new HashMap<String,Integer>(((fields.length * 4) / 3) + 5, 0.75f);
        HashMap<Integer,String> values = new HashMap<Integer,String>(((fields.length * 4) / 3) + 5, 0.75f);
        for (int i = 0; i < fields.length; i++) {
            if (Modifier.isStatic(fields[i].getModifiers())) {
                String name = fields[i].getName();
                if (name.startsWith("VK_")) { // NOI18N
                    // exclude VK
                    name = name.substring(3);
                    try {
                        int numb = fields[i].getInt(null);
                        Integer value = new Integer(numb);
                        names.put(name, value);
                        values.put(value, name);
                    } catch (IllegalArgumentException ex) {
                    } catch (IllegalAccessException ex) {
                    }
                }
            }
        }
        if (names.get("CONTEXT_MENU") == null) { // NOI18N
            Integer n = new Integer(0x20C);
            names.put("CONTEXT_MENU", n); // NOI18N
            values.put(n, "CONTEXT_MENU"); // NOI18N
            n = new Integer(0x20D);
            names.put("WINDOWS", n); // NOI18N
            values.put(n, "WINDOWS"); // NOI18N
        }
        HashMap[] arr = { names, values };
        namesAndValues = new SoftReference<Object>(arr);
        return arr;
    }
    /** Converts a Swing key stroke descriptor to a familiar Emacs-like name.
    * @param stroke key description
    * @return name of the key (e.g. <code>CS-F1</code> for control-shift-function key one)
    * @see #stringToKey
    */
    public static String keyToString(KeyStroke stroke) {
        StringBuffer sb = new StringBuffer();
        // add modifiers that must be pressed
        if (addModifiers(sb, stroke.getModifiers())) {
            sb.append("-");
        }
        HashMap[] namesAndValues = initNameAndValues();
        String c = (String) namesAndValues[1].get(new Integer(stroke.getKeyCode()));
        if (c == null) {
            sb.append(stroke.getKeyChar());
        } else {
            sb.append(c);
        }
        return sb.toString();
    }
    /** Construct a new key description from a given universal string
    * description.
    * Provides mapping between Emacs-like textual key descriptions and the
    * <code>KeyStroke</code> object used in Swing.
    * <P>
    * This format has following form:
    * <P><code>[C][A][S][M]-<em>identifier</em></code>
    * <p>Where:
    * <UL>
    * <LI> <code>C</code> stands for the Control key
    * <LI> <code>A</code> stands for the Alt key
    * <LI> <code>S</code> stands for the Shift key
    * <LI> <code>M</code> stands for the Meta key
    * </UL>
    * The format also supports two wildcard codes, to support differences in
    * platforms.  These are the preferred choices for registering keystrokes,
    * since platform conflicts will automatically be handled:
    * <UL>
    * <LI> <code>D</code> stands for the default menu accelerator - the Control
    *  key on most platforms, the Command (meta) key on Macintosh</LI>
    * <LI> <code>O</code> stands for the alternate accelerator - the Alt key on
    *  most platforms, the Ctrl key on Macintosh (Macintosh uses Alt as a
    *  secondary shift key for composing international characters - if you bind
    *  Alt-8 to an action, a mac user with a French keyboard will not be able
    *  to type the <code>[</code> character, which is a significant handicap</LI>
    * </UL>
    * If you use the wildcard characters, and specify a key which will conflict
    * with keys the operating system consumes, it will be mapped to whichever
    * choice can work - for example, on Macintosh, Command-Q is always consumed
    * by the operating system, so <code>D-Q</code> will always map to Control-Q.
    * <p>
    * Every modifier before the hyphen must be pressed.
    * <em>identifier</EM> can be any text constant from {@link KeyEvent} but
    * without the leading <code>VK_</code> characters. So {@link KeyEvent#VK_ENTER} is described as
    * <code>ENTER</code>.
    *
    * @param s the string with the description of the key
    * @return key description object, or <code>null</code> if the string does not represent any valid key
    */
    public static KeyStroke stringToKey(String s) {
        StringTokenizer st = new StringTokenizer(s.toUpperCase(Locale.ENGLISH), "-", true); // NOI18N
        int needed = 0;
        HashMap names = initNameAndValues()[0];
        int lastModif = -1;
        try {
            for (;;) {
                String el = st.nextToken();
                // required key
                if (el.equals("-")) { // NOI18N
                    if (lastModif != -1) {
                        needed |= lastModif;
                        lastModif = -1;
                    }
                    continue;
                }
                // if there is more elements
                if (st.hasMoreElements()) {
                    // the text should describe modifiers
                    lastModif = readModifiers(el);
                } else {
                    // last text must be the key code
                    Integer i = (Integer) names.get(el);
                    boolean wildcard = (needed & CTRL_WILDCARD_MASK) != 0;
                    //Strip out the explicit mask - KeyStroke won"t know
                    //what to do with it
                    needed = needed & ~CTRL_WILDCARD_MASK;
                    boolean macAlt = (needed & ALT_WILDCARD_MASK) != 0;
                    needed = needed & ~ALT_WILDCARD_MASK;
                    if (i != null) {
                        //#26854 - Default accelerator should be Command on mac
                        if (wildcard) {
                            needed |= getMenuShortCutKeyMask();
                            if ((getOperatingSystem() & OS_MAC) != 0) {
                                if (!usableKeyOnMac(i.intValue(), needed)) {
                                    needed &= ~getMenuShortCutKeyMask();
                                    needed |= KeyEvent.CTRL_MASK;
                                }
                            }
                        }
                        if (macAlt) {
                            if (getOperatingSystem() == OS_MAC) {
                                needed |= KeyEvent.CTRL_MASK;
                            } else {
                                needed |= KeyEvent.ALT_MASK;
                            }
                        }
                        return KeyStroke.getKeyStroke(i.intValue(), needed);
                    } else {
                        return null;
                    }
                }
            }
        } catch (NoSuchElementException ex) {
            return null;
        }
    }
    /**
     * need to guard against headlessExceptions when testing.
     * @return the acceletor mask for shortcuts.
     */
    private static int getMenuShortCutKeyMask() {
        if (GraphicsEnvironment.isHeadless()) {
            return ((getOperatingSystem() & OS_MAC) != 0) ? 
                    KeyEvent.META_MASK : KeyEvent.CTRL_MASK;
        }
 
        return Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
    }
    private static boolean usableKeyOnMac(int key, int mask) {
        //All permutations fail for Q except ctrl
        if (key == KeyEvent.VK_Q) {
            return false;
        }
        boolean isMeta = ((mask & KeyEvent.META_MASK) != 0) || ((mask & KeyEvent.CTRL_DOWN_MASK) != 0);
        boolean isAlt = ((mask & KeyEvent.ALT_MASK) != 0) || ((mask & KeyEvent.ALT_DOWN_MASK) != 0);
        boolean isOnlyMeta = isMeta && ((mask & ~(KeyEvent.META_DOWN_MASK | KeyEvent.META_MASK)) == 0);
        //Mac OS consumes keys Command+ these keys - the app will never see
        //them, so CTRL should not be remapped for these
        if (isOnlyMeta) {
            return (key != KeyEvent.VK_H) && (key != KeyEvent.VK_SPACE) && (key != KeyEvent.VK_TAB);
        } else return !((key == KeyEvent.VK_D) && isMeta && isAlt);
    }
    /** Convert a space-separated list of Emacs-like key binding names to a list of Swing key strokes.
    * @param s the string with keys
    * @return array of key strokes, or <code>null</code> if the string description is not valid
    * @see #stringToKey
    */
    public static KeyStroke[] stringToKeys(String s) {
        StringTokenizer st = new StringTokenizer(s.toUpperCase(Locale.ENGLISH), " "); // NOI18N
        ArrayList<KeyStroke> arr = new ArrayList<KeyStroke>();
        while (st.hasMoreElements()) {
            s = st.nextToken();
            KeyStroke k = stringToKey(s);
            if (k == null) {
                return null;
            }
            arr.add(k);
        }
        return arr.toArray(new KeyStroke[arr.size()]);
    }
    /** Adds characters for modifiers to the buffer.
    * @param buf buffer to add to
    * @param modif modifiers to add (KeyEvent.XXX_MASK)
    * @return true if something has been added
    */
    private static boolean addModifiers(StringBuffer buf, int modif) {
        boolean b = false;
        if ((modif & KeyEvent.CTRL_MASK) != 0) {
            buf.append("C"); // NOI18N
            b = true;
        }
        if ((modif & KeyEvent.ALT_MASK) != 0) {
            buf.append("A"); // NOI18N
            b = true;
        }
        if ((modif & KeyEvent.SHIFT_MASK) != 0) {
            buf.append("S"); // NOI18N
            b = true;
        }
        if ((modif & KeyEvent.META_MASK) != 0) {
            buf.append("M"); // NOI18N
            b = true;
        }
        if ((modif & CTRL_WILDCARD_MASK) != 0) {
            buf.append("D");
            b = true;
        }
        if ((modif & ALT_WILDCARD_MASK) != 0) {
            buf.append("O");
            b = true;
        }
        return b;
    }
    /** Reads for modifiers and creates integer with required mask.
    * @param s string with modifiers
    * @return integer with mask
    * @exception NoSuchElementException if some letter is not modifier
    */
    private static int readModifiers(String s) throws NoSuchElementException {
        int m = 0;
        for (int i = 0; i < s.length(); i++) {
            switch (s.charAt(i)) {
            case "C":
                m |= KeyEvent.CTRL_MASK;
                break;
            case "A":
                m |= KeyEvent.ALT_MASK;
                break;
            case "M":
                m |= KeyEvent.META_MASK;
                break;
            case "S":
                m |= KeyEvent.SHIFT_MASK;
                break;
            case "D":
                m |= CTRL_WILDCARD_MASK;
                break;
            case "O":
                m |= ALT_WILDCARD_MASK;
                break;
            default:
                throw new NoSuchElementException(s);
            }
        }
        return m;
    }
    
    
}





Platform specific functionality.

   

import java.awt.Frame;
import java.lang.reflect.Method;
/**
 * Platform specific functionality.
 *
 * @author 
 * @version $Id: Platform.java 582434 2007-10-06 02:11:51Z cam $
 */
public abstract class Platform {
    /**
     * Whether we are running on Mac OS X.
     */
    public static boolean isOSX =
        System.getProperty("os.name").equals("Mac OS X");
    /**
     * Whether we are running on JRE 1.3.
     */
    public static boolean isJRE13 =
        System.getProperty("java.version").startsWith("1.3");
    /**
     * Unmaximizes the specified Frame.
     */
    public static void unmaximize(Frame f) {
        if (!isJRE13) {
            try {
                Method m1 =
                    Frame.class.getMethod("getExtendedState", (Class[]) null);
                Method m2 =
                    Frame.class.getMethod("setExtendedState",
                                          new Class[] { Integer.TYPE });
                int i = ((Integer) m1.invoke(f, (Object[]) null)).intValue();
                m2.invoke(f, new Object[] { new Integer(i & ~6) });
            } catch (java.lang.reflect.InvocationTargetException ite) {
            } catch (NoSuchMethodException nsme) {
            } catch (IllegalAccessException iae) {
            }
        }
    }
}





Splits apart a OS separator delimited set of paths in a string into multiple Strings.

  
import java.io.File;
import java.io.FileFilter;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *  
 *    http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License. 
 *  
 */

/**
 * Various string manipulation methods that are more efficient then chaining
 * string operations: all is done in the same buffer without creating a bunch of
 * string objects.
 * 
 * @author 
 */
public class Main {

  /**
   * Splits apart a OS separator delimited set of paths in a string into
   * multiple Strings. File component path strings are returned within a List
   * in the order they are found in the composite path string. Optionally, a
   * file filter can be used to filter out path strings to control the
   * components returned. If the filter is null all path components are
   * returned.
   * 
   * @param paths
   *            a set of paths delimited using the OS path separator
   * @param filter
   *            a FileFilter used to filter the return set
   * @return the filter accepted path component Strings in the order
   *         encountered
   */
  public static final List getPaths( String paths, FileFilter filter )
  {
      int start = 0;
      int stop = -1;
      String path = null;
      ArrayList<String> list = new ArrayList<String>();
      // Abandon with no values if paths string is null
      if ( paths == null || paths.trim().equals( "" ) )
      {
          return list;
      }
      final int max = paths.length() - 1;
      // Loop spliting string using OS path separator: terminate
      // when the start index is at the end of the paths string.
      while ( start < max )
      {
          stop = paths.indexOf( File.pathSeparatorChar, start );
          // The is no file sep between the start and the end of the string
          if ( stop == -1 )
          {
              // If we have a trailing path remaining without ending separator
              if ( start < max )
              {
                  // Last path is everything from start to the string"s end
                  path = paths.substring( start );
                  // Protect against consecutive separators side by side
                  if ( !path.trim().equals( "" ) )
                  {
                      // If filter is null add path, if it is not null add the
                      // path only if the filter accepts the path component.
                      if ( filter == null || filter.accept( new File( path ) ) )
                      {
                          list.add( path );
                      }
                  }
              }
              break; // Exit loop no more path components left!
          }
          // There is a separator between start and the end if we got here!
          // start index is now at 0 or the index of last separator + 1
          // stop index is now at next separator in front of start index
          path = paths.substring( start, stop );
          // Protect against consecutive separators side by side
          if ( !path.trim().equals( "" ) )
          {
              // If filter is null add path, if it is not null add the path
              // only if the filter accepts the path component.
              if ( filter == null || filter.accept( new File( path ) ) )
              {
                  list.add( path );
              }
          }
          // Advance start index past separator to start of next path comp
          start = stop + 1;
      }
      return list;
  }
}