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

java.util.prefs.Preferences.childrenNames()
Returns the names of the children of this preference node, relative to this node. (The returned array will be of size zero if this node has no children.) @return the names of the children of this preference node. @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.

        
        Preferences ejbNode = getInitialContextEjbNode();
        
        try
        {
            String[] childrenNames = ejbNode.childrenNames();
            
            for ( int i = 0; i < childrenNames.length; i++ )
            {
                Preferences node = ejbNode.node( childrenNames[i] );

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      String nodeName = rootNodeName + "/testListKeys";
      
      Preferences pref = fillTree(isSystemRoot, nodeName);
      pref = getRightNode(isSystemRoot, rootNodeName);
      
      String[] keys = pref.childrenNames();
      assert keys.length == 1 : "There should only be one key in this node.";
      assert keys[0].equals("testListKeys") : "the key should be named testListKeys";
    } finally {
      MultiPreferencesFactory.setFactory(savedFactory);
    }

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    {
        Preferences prefs = Preferences.userRoot();
        // Test without children.
        try
        {
            String[] childrenNames = prefs.childrenNames();
            if (childrenNames.length > 0)
            {
                assertTrue("expected no children, " + childrenNames.length + ", " + childrenNames[0],
                        childrenNames.length == 0);
            }

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        removeNode.removeNode();
        assertFalse(prefs.nodeExists(test_node));
        
        try
        {
           removeNode.childrenNames();
           assertFalse("An IllegalStateException should have been thrown by the AbtractPreferences class", true);
        }
        catch (IllegalStateException e)
        {

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        assertEquals(-1, prefs1.getLong("pd", -1));
        assertEquals("é", prefs1.get("pe", null));


        Preferences prefs2 = new PropertiesPreferences(
                makeInput("pa=1\na.pb=2\na.b.pc=3\na.b2.pd=uvw\nb.pe=42"));
        String[] children = prefs2.childrenNames();
        Arrays.sort(children);
        assertEquals("a", children[0]);
        assertEquals("b", children[1]);
        assertEquals(1, prefs2.getLong("pa", 0));
        assertEquals(2, prefs2.node("a").getLong("pb", 0));

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    {
        Preferences prefs = Preferences.userRoot();
        // Test without children.
        try
        {
            String[] childrenNames = prefs.childrenNames();
            if (childrenNames.length > 0)
            {
                assertTrue("expected no children, " + childrenNames.length + ", " + childrenNames[0],
                        childrenNames.length == 0);
            }

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        removeNode.removeNode();
        assertFalse(prefs.nodeExists(test_node));


        try
        {
            removeNode.childrenNames();
            assertFalse("An IllegalStateException should have been thrown by the AbtractPreferences class", true);
        }
        catch (IllegalStateException e)
        {

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    private Set<String> filterCustomCRSs( Set<String> descriptions, String[] searchParms ) {
        try {
            Preferences root = Preferences.userRoot();
            Preferences node = root.node(CUSTOM_ID);


            for( String id : node.childrenNames() ) {
                Preferences child = node.node(id);
                String string = child.get(NAME_ID, null);
                if (string != null && matchesFilter(string.toUpperCase(), searchParms)) {
                    descriptions.add(string);
                    continue;

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            if (node.nodeExists(code)) {
                return node.node(code);
            }


            for( String id : node.childrenNames() ) {
                Preferences child = node.node(id);
                String name = child.get(NAME_ID, null);
                if (name != null && matchesFilter(name, new String[]{code})) {
                    return child;
                }

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    }


    private void loadChilds(Device device, Preferences deviceNode)
            throws BackingStoreException, ConfigurationException {
        Preferences connsNode = deviceNode.node("dcmNetworkConnection");
        for (int connIndex : sort(connsNode.childrenNames())) {
            Connection conn = newConnection();
            loadFrom(conn, connsNode.node("" + connIndex));
            device.addConnection(conn);
        }
        List<Connection> devConns = device.listConnections();

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