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()


    try
    {
      final Enumeration keys = config.getConfigProperties();
      final Preferences pref = base.node(configPath);
      pref.clear();
      while (keys.hasMoreElements())
      {
        final String key = (String) keys.nextElement();
        final String value = config.getConfigProperty(key);
        if (value != null)

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   public static Preferences loadArgs(String[] args) {
      try {
         // user: See $HOME/.java/.userPrefs
         // root: See /opt/j2sdk1.4.2_06/jre/.systemPrefs/prefs.xml
         Preferences prefs = Preferences.userRoot();
         prefs.clear();


         // ---- Database settings -----
         String driverClass = System.getProperty("jdbc.drivers", "org.hsqldb.jdbcDriver:oracle.jdbc.driver.OracleDriver:com.microsoft.jdbc.sqlserver.SQLServerDriver:org.postgresql.Driver");
         // String dbUrl = System.getProperty("db.url", "jdbc:oracle:thin:@localhost:1521:orcl");
         String dbUrl = System.getProperty("db.url", "jdbc:postgresql:test//localhost/test");

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    * @return Configuration
    */
   public static Preferences loadArgs(String[] args) {
      try {
         Preferences prefs = Preferences.userRoot();
         prefs.clear();
         // String dbUrl = System.getProperty("db.url", "jdbc:oracle:thin:@localhost:1521:orcl");
         // String dbUser = System.getProperty("db.user", "system");


         String driverClass = System.getProperty("jdbc.drivers", "org.hsqldb.jdbcDriver:oracle.jdbc.driver.OracleDriver:com.microsoft.jdbc.sqlserver.SQLServerDriver:org.postgresql.Driver");
         String dbUrl = System.getProperty("db.url", "jdbc:postgresql:test//localhost/test");

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   public static Preferences loadArgs(String[] args) {
      try {
         // user: See $HOME/.java/.userPrefs
         // root: See /opt/j2sdk1.4.2_06/jre/.systemPrefs/prefs.xml
         Preferences prefs = Preferences.userRoot();
         prefs.clear();


         // ---- Database settings -----
         String driverClass = System.getProperty("jdbc.drivers", "org.hsqldb.jdbcDriver:oracle.jdbc.driver.OracleDriver:com.microsoft.jdbc.sqlserver.SQLServerDriver:org.postgresql.Driver");
         String dbUrl = System.getProperty("db.url", "jdbc:oracle:thin:@localhost:1521:orcl");
         String dbUser = System.getProperty("db.user", "system");

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    * @return Configuration
    */
   public static Preferences loadArgs(String[] args) {
      try {
         Preferences prefs = Preferences.userRoot();
         prefs.clear();
         // String dbUrl = System.getProperty("db.url", "jdbc:oracle:thin:@localhost:1521:orcl");
         // String dbUser = System.getProperty("db.user", "system");


         String driverClass = System.getProperty("jdbc.drivers", "org.hsqldb.jdbcDriver:oracle.jdbc.driver.OracleDriver:com.microsoft.jdbc.sqlserver.SQLServerDriver:org.postgresql.Driver");
         String dbUrl = System.getProperty("db.url", "jdbc:postgresql:test//localhost/test");

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            // Store overridden definitions to Preferences.
            Preferences pre = Preferences.userNodeForPackage
                (net.sf.jabref.labelPattern.LabelPattern.class);
            try {
                pre.clear(); // We remove all old entries.
            } catch (BackingStoreException ex) {
                Globals.logger("BackingStoreException in JabRefPreferences.putKeyPattern");
            }


            for (String s: pattern.keySet()){

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        public void save() {
            Preferences prefs = Preferences.userNodeForPackage(LogViewerFrame.class);
            prefs = prefs.node("loggerTable");


            try {
                prefs.clear();
            } catch (BackingStoreException ex) {
                logger.log(Level.WARNING, "Error clearing preferences", ex);
            }


            for (int i = 0; i < getRowCount(); i++) {

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    try
    {
      final Enumeration keys = config.getConfigProperties();
      final Preferences pref = base.node(configPath);
      pref.clear();
      while (keys.hasMoreElements())
      {
        final String key = (String) keys.nextElement();
        final String value = config.getConfigProperty(key);
        if (value != null)

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        System.out.println(prefs.getLong(WebCloudNameLookup.KEY_APPENGINECLOUD_SESSION_ID, 0));
        WebCloudNameLookup.clearSavedSessionInformation();


        prefs.flush();
        prefs.clear();
        prefs.flush();
    }


}

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    }


    static void clear() {
        Preferences p = Preferences.userNodeForPackage(GUISaveState.class);
        try {
            p.clear();
        } catch (BackingStoreException e) {
            Debug.println(e);
        }
        instance = new GUISaveState();
    }

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