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The Java Developers Almanac 1.4Order this book from Amazon. |
e407. Determining If a Preference Node Contains a Specific ValueThis example enumerates the key/value pairs in a preference node and checks each value for a match.// Returns the key of a preference whose value matches the specified value; // null is returned if no such key exists. public static String containsValue(Preferences node, String value) { try { // Get all the keys String[] keys = node.keys(); // Scan the keys for (int i=0; i<keys.length; i++) { if (value.equals(node.get(keys[i], null))) { return keys[i]; } } } catch (BackingStoreException e) { } return null; }
e406. Determining If a Preference Node Contains a Specific Key e408. Removing a Preference from a Preference Node e409. Getting and Setting Java Type Values in a Preference e410. Getting the Maximum Size of a Preference Key and Value
© 2002 Addison-Wesley. |