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

        // 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 = 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) &&
            (OSInfo.getOSType() == OSInfo.OSType.WINDOWS &&
             OSInfo.getWindowsVersion().compareTo(OSInfo.WINDOWS_XP) >= 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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    }


    private static void initDefault() {
        String language, region, script, country, variant;
        language = AccessController.doPrivileged(
            new GetPropertyAction("user.language", "en"));
        // for compatibility, check for old user.region property
        region = AccessController.doPrivileged(
            new GetPropertyAction("user.region"));
        if (region != null) {
            // region can be of form country, country_variant, or _variant
            int i = region.indexOf('_');
            if (i >= 0) {
                country = region.substring(0, i);
                variant = region.substring(i + 1);
            } else {
                country = region;
                variant = "";
            }
            script = "";
        } else {
            script = AccessController.doPrivileged(
                new GetPropertyAction("user.script", ""));
            country = AccessController.doPrivileged(
                new GetPropertyAction("user.country", ""));
            variant = AccessController.doPrivileged(
                new GetPropertyAction("user.variant", ""));
        }
        defaultLocale = getInstance(language, script, country, variant, null);
    }

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            initDefault();
        }


        Locale defaultCategoryLocale = getInstance(
            AccessController.doPrivileged(
                new GetPropertyAction(category.languageKey, defaultLocale.getLanguage())),
            AccessController.doPrivileged(
                new GetPropertyAction(category.scriptKey, defaultLocale.getScript())),
            AccessController.doPrivileged(
                new GetPropertyAction(category.countryKey, defaultLocale.getCountry())),
            AccessController.doPrivileged(
                new GetPropertyAction(category.variantKey, defaultLocale.getVariant())),
            null);


        switch (category) {
        case DISPLAY:
            defaultDisplayLocale = defaultCategoryLocale;

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     *
     * @return the graphics environment
     */
    private static GraphicsEnvironment createGE() {
        GraphicsEnvironment ge;
        String nm = AccessController.doPrivileged(new GetPropertyAction("java.awt.graphicsenv", null));
        try {
//          long t0 = System.currentTimeMillis();
            Class geCls;
            try {
                // First we try if the bootclassloader finds the requested

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     * @see #setLookAndFeel
     * @see #getCrossPlatformLookAndFeelClassName
     */
    public static String getSystemLookAndFeelClassName() {
        String systemLAF = AccessController.doPrivileged(
                             new GetPropertyAction("swing.systemlaf"));
        if (systemLAF != null) {
            return systemLAF;
        }
        OSInfo.OSType osType = AccessController.doPrivileged(OSInfo.getOSTypeAction());
        if (osType == OSInfo.OSType.WINDOWS) {
            return "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
        } else {
            String desktop = AccessController.doPrivileged(new GetPropertyAction("sun.desktop"));
            Toolkit toolkit = Toolkit.getDefaultToolkit();
            if ("gnome".equals(desktop) &&
                    toolkit instanceof SunToolkit &&
                    ((SunToolkit) toolkit).isNativeGTKAvailable()) {
                // May be set on Linux and Solaris boxs.

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

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    private static synchronized TimeZone setDefaultZone() {
        TimeZone tz = null;
        // get the time zone ID from the system properties
        String zoneID = AccessController.doPrivileged(
                new GetPropertyAction("user.timezone"));


        // if the time zone ID is not set (yet), perform the
        // platform to Java time zone ID mapping.
        if (zoneID == null || zoneID.equals("")) {
            String country = AccessController.doPrivileged(
                    new GetPropertyAction("user.country"));
            String javaHome = AccessController.doPrivileged(
                    new GetPropertyAction("java.home"));
            try {
                zoneID = getSystemTimeZoneID(javaHome, country);
                if (zoneID == null) {
                    zoneID = GMT_ID;
                }

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        if (!checkedWindows) {
            OSInfo.OSType osType = AccessController.doPrivileged(OSInfo.getOSTypeAction());
            if (osType == OSInfo.OSType.WINDOWS) {
                isWindows = true;
                String systemFonts = 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 = AccessController.doPrivileged(
                               new GetPropertyAction("swing.metalTheme"));
                if ("steel".equals(theme)) {
                    currentTheme = new DefaultMetalTheme();
                }
                else {
                    currentTheme = new OceanTheme();

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