throw new NumberFormatException("Parameter " + key + " is missing or malformed (should be true/yes or false/no)");
	public boolean getBooleanProperty(String key) {		String booleanS = getProperty(key);		try {			return Boolean.valueOf(booleanS).booleanValue();		} catch (Exception e) {			throw new NumberFormatException("Parameter " + key + " is missing or malformed (should be true or false)");		}	}