Examples of sun.security.action.GetPropertyAction

sun.security.action.GetPropertyAction
A convenience class for retrieving the string value of a system property as a privileged action.
An instance of this class can be used as the argument of AccessController.doPrivileged.
The following code retrieves the value of the system property named "prop" as a privileged action:
```
 String s = java.security.AccessController.doPrivileged (new GetPropertyAction("prop")); 
```
@author Roland Schemers @see java.security.PrivilegedAction @see java.security.AccessController @since 1.2

     */
    public static Charset defaultCharset() {
        if (defaultCharset == null) {
      synchronized (Charset.class) {
    java.security.PrivilegedAction pa =
        new GetPropertyAction("file.encoding");
    String csn = (String)AccessController.doPrivileged(pa);
    Charset cs = lookup(csn);
    if (cs != null)
        defaultCharset = cs;
                else

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        static final String temporaryDirectory = temporaryDirectory();
        static String temporaryDirectory() {
            return fs.normalize(
                AccessController.doPrivileged(
                    new GetPropertyAction("java.io.tmpdir")));
        }

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  // Using the fonts set by the user can potentially cause
  // performance and compatibility issues, so allow this feature
  // to be switched off either at runtime or programmatically
  //
  String systemFonts = (String) java.security.AccessController.doPrivileged(
               new GetPropertyAction("swing.useSystemFontSettings"));
  useSystemFontSettings = (systemFonts == null ||
                                 Boolean.valueOf(systemFonts).booleanValue());


        if (useSystemFontSettings) {
            Object value = UIManager.get("Application.useSystemFontSettings");

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  if (!(this instanceof WindowsClassicLookAndFeel) &&
      (System.getProperty("os.name").startsWith("Windows ") &&
       System.getProperty("os.version").compareTo("5.1") >= 0) &&
      AccessController.doPrivileged(new GetPropertyAction("swing.noxp")) == null) {


      // These desktop properties are not used directly, but are needed to
      // trigger realoading of UI's.
      this.themeActive = new TriggerDesktopProperty("win.xpstyle.themeActive");
      this.dllName     = new TriggerDesktopProperty("win.xpstyle.dllName");

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    /**
     * Simple utility method that reads system keys.
     */
    private String getSystemProperty(String key) {
        return AccessController.doPrivileged(new GetPropertyAction(key));
    }

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     */
    private static boolean getSuppressDropTarget() {
        if (!checkedSuppressDropSupport) {
            suppressDropSupport = Boolean.valueOf(
                AccessController.doPrivileged(
                    new GetPropertyAction("suppressSwingDropSupport")));
            checkedSuppressDropSupport = true;
        }
        return suppressDropSupport;
    }

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     * Returns true if running on Windows.
     */
    static boolean isWindows() {
        if (!checkedWindows) {
            String osName = (String)AccessController.doPrivileged(
                new GetPropertyAction("os.name"));
            if (osName != null && osName.indexOf("Windows") != -1) {
                isWindows = true;
                String systemFonts = (String)AccessController.doPrivileged(
                    new GetPropertyAction("swing.useSystemFontSettings"));
                useSystemFonts = (systemFonts != null &&
                               (Boolean.valueOf(systemFonts).booleanValue()));
            }
            checkedWindows = true;
        }

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                }
                else {
                    // Create the default theme. We prefer Ocean, but will
                    // use DefaultMetalTheme if told to.
                    String theme = (String)AccessController.doPrivileged(
                                   new GetPropertyAction("swing.metalTheme"));
                    if ("steel".equals(theme)) {
                        currentTheme = new DefaultMetalTheme();
                    }
                    else {
                        currentTheme = new OceanTheme();

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     * @see #setLookAndFeel
     * @see #getCrossPlatformLookAndFeelClassName
     */
    public static String getSystemLookAndFeelClassName() {
  String systemLAF = (String)AccessController.doPrivileged(
                             new GetPropertyAction("swing.systemlaf"));
        if (systemLAF != null) {
            return systemLAF;
        }
  String osName = (String)AccessController.doPrivileged(
                             new GetPropertyAction("os.name"));


        if (osName != null) {
            if (osName.indexOf("Windows") != -1) {
                return "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
            }
            else {
                String desktop = (String)AccessController.doPrivileged(
                             new GetPropertyAction("sun.desktop"));
                if ("gnome".equals(desktop)) {
                    // May be set on Linux and Solaris boxs.
                    return "com.sun.java.swing.plaf.gtk.GTKLookAndFeel";
                }
                if ((osName.indexOf("Solaris") != -1) ||

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     * @see #setLookAndFeel
     * @see #getSystemLookAndFeelClassName
     */
    public static String getCrossPlatformLookAndFeelClassName() {
  String laf = (String)AccessController.doPrivileged(
                             new GetPropertyAction("swing.crossplatformlaf"));
        if (laf != null) {
            return laf;
        }
        return "javax.swing.plaf.metal.MetalLookAndFeel";
    }

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