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()

     */
    public void save(Preferences preferences) {


        Preferences recentNode = preferences.node(SETTINGS_RECENT_WORKSPACES);
        try {
            recentNode.clear();
        } catch (BackingStoreException e) {
        }
        int count = 0;
        for (String fileName : recentWorkspaces) {
            recentNode.put(String.valueOf(count++), fileName);

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                if (keywordsText.getText().trim().length() > 0) {
                    Preferences node = findNode(createdCRS.getName().getCode());
                    if (node != null) {
                        Preferences kn = node.node(ALIASES_ID);
                        String[] keywords = keywordsText.getText().split(","); //$NON-NLS-1$
                        kn.clear();
                        for( String string : keywords ) {
                            string = string.trim().toUpperCase();
                            if (string.length() > 0)
                                kn.put(string, string);
                        }

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    protected void store() {
        Preferences prefs = getPreferences();


        // clear the backing store
        try {
            prefs.clear();
        } catch (BackingStoreException ex) {
        }


        for (int i = 0; i < gradients.size(); i++) {
            LinearGradient gradient = gradients.get(i);

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    protected void store() {
        Preferences prefs = getPreferences();


        // clear the backing store
        try {
            prefs.clear();
        } catch (BackingStoreException ex) {
        }


        for (int i = 0; i < gradients.size(); i++) {
            LinearGradient gradient = gradients.get(i);

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    protected void store() {
        Preferences prefs = getPreferences();


        // clear the backing store
        try {
            prefs.clear();
        } catch (BackingStoreException ex) {
        }


        for (int i = 0; i < mruFileList.size(); i++) {
            String str = mruFileList.get(i);

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  public void testClear() {
    Preferences delegate = getRoot();
    Preferences prefs = getCPRoot();
    delegate.put("Foo", "Bar");
    try {
      prefs.clear();
      assertEquals("Baz", delegate.get("Foo", "Baz"));
    } catch (BackingStoreException e) {
      e.printStackTrace();
      fail();
    }

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        addMessage("After in parent");
    }


    public static void clearMessages() throws BackingStoreException {
        Preferences prefs = Preferences.userNodeForPackage(BeforeAfterParent.class);
        prefs.clear();
        prefs.sync();
    }


    public static void addMessage(String message) {
        Preferences prefs = Preferences.userNodeForPackage(BeforeAfterParent.class);

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  // save reports
  private static void saveReports() throws Exception {


    // clear and recreate reports node
    Preferences reportsPreferences = preferences.node("saved_reports");
    reportsPreferences.clear();


    // get reports to save
    Enumeration<ReportsModel.ReportTreeNode> e = BEViewer.reportsModel.elements();
    int i=0;
    while (e.hasMoreElements()) {

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  // save bookmarks
  private static void saveBookmarks() throws Exception {


    // clear and recreate bookmarks node
    Preferences bookmarksPreferences = preferences.node("saved_bookmarks");
    bookmarksPreferences.clear();


    // get number of bookmarks to save
    int size = BEViewer.bookmarksModel.size();


    // save the bookmarks

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