import java.util.prefs.Preferences;
public class Main {
public static void main(String[] argv) throws Exception {
// Get maximum key length
int keyMax = Preferences.MAX_KEY_LENGTH;
// Get maximum value length
int valueMax = Preferences.MAX_VALUE_LENGTH;
// Get maximum length of byte array values
int bytesMax = Preferences.MAX_VALUE_LENGTH * 3 / 4;
}
}