private static Properties	properties;

private static String getProp(String propKey) {
	if (properties == null) {
		properties = new Properties();
		try {
			properties.load(new FileInputStream("myprops.config"));
		} catch (IOException e) {
		}
	}
	return properties.getProperty(propKey);
}

Loads Properties from a file and retrieves a single String property.

Get String from file-backed Properties

Java