Examples of java.util.prefs.Preferences.clear()

java.util.prefs.Preferences.clear()
Removes all of the preferences (key-value associations) in this preference node. This call has no effect on any descendants of this node.
If this implementation supports stored defaults, and this node in the preferences hierarchy contains any such defaults, the stored defaults will be "exposed" by this call, in the sense that they will be returned by succeeding calls to get. @throws BackingStoreException if this operation cannot be completeddue to a failure in the backing store, or inability to communicate with it. @throws IllegalStateException if this node (or an ancestor) has beenremoved with the {@link #removeNode()} method. @see #removeNode()

        {
            // Expected
        }


        Preferences prefs = Preferences.userNodeForPackage(TestFeedDisplayModeManager.class);
        prefs.clear();


        // Put invalid records
        prefs.put("cdmm.", "test1");
        prefs.put("cdmm.a", "test2");
        prefs.put("cdmm.1", "test3");

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        return monitor;
    }


    public static void clear() {
        Preferences p = getPrefs(true);
        try { p.clear(); } catch (BackingStoreException e) { }
    }


    static Preferences getPrefs() {
        return getPrefs(false);
    }

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        if (prefs == null) {
            synchronized(AppPreferences.class) {
                if (prefs == null) {
                    Preferences p = Preferences.userNodeForPackage(Main.class);
                    if (shouldClear) {
                        try { p.clear(); } catch (BackingStoreException e) { }
                    }
                    myListener = new MyListener();
                    p.addPreferenceChangeListener(myListener);
                    prefs = p;

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        Preferences prefs = Preferences.userRoot().node(preferencesKey);


        // Clear any previous settings set before saving, this will
        // purge any other parameters set in older versions of the app, so
        // that they don't leak onto the AppSettings of newer versions.
        prefs.clear();


        for (String key : keySet()) {
            Object val = get(key);
            if (val instanceof Integer) {
                prefs.putInt("I_" + key, (Integer) val);

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     * preferences.
     */
    private void storeFileNames() {
        Preferences p = Preferences.userNodeForPackage(this.getClass());
        try {
            p.clear();
            p.flush();
            p = Preferences.userNodeForPackage(this.getClass());
            int itemCount = dirName.getItemCount();
            int selected = dirName.getSelectedIndex();
            p.put("dirName0", (String) dirName.getItemAt(selected));

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                        while (arr.size() > ModelerPreferences.LAST_PROJ_FILES_SIZE) {
                            arr.remove(arr.size() - 1);
                        }


                        frefLastProjFiles.clear();
                        int size = arr.size();


                        for (int i = 0; i < size; i++) {
                            frefLastProjFiles.put(String.valueOf(i), arr
                                    .get(i)

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        while (arr.size() > ModelerPreferences.LAST_PROJ_FILES_SIZE) {
            arr.remove(arr.size() - 1);
        }


        try {
            frefLastProjFiles.clear();
        }
        catch (BackingStoreException e) {
            // ignore exception
        }
        int size = arr.size();

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        while (arr.size() > ModelerPreferences.LAST_PROJ_FILES_SIZE) {
            arr.remove(arr.size() - 1);
        }


        try {
            frefLastProjFiles.clear();
        }
        catch (BackingStoreException e) {
            // ignore exception
        }
        int size = arr.size();

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        try {
            p.childrenNames();
        } catch (BackingStoreException e4) {
        }
        try {
            p.clear();
        } catch (BackingStoreException e5) {
        }
        try {
            p.exportNode(null);
        } catch (IOException e6) {

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        Preferences romPref = prefs.node(String.valueOf(nextRomIndex));


        for (int i = 0; i < DeviceContext.SAMPLE_ROM_SIZE; i++) {
            if (sampleNames[i] == null) {
                romPref.clear();
                return;
            }
            romPref.put(String.valueOf(i), sampleNames[i]);
        }

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