### Question:
Configuration { public static Configuration getInstance() { if (instance == null) { instance = extractConfigurationImplementation(); } return instance; } protected  Configuration(); static Configuration getInstance(); static void setConfigName(String configName); static Object lookup(String name, Object... runtimeParamters); static T lookup(Class<T> clazz, Object... runtimeParamters);  }### Answer:
@Test public void testGetInstance() { ElapseTimer timer = ElapseTimer.createInstance().start(); Configuration.setConfigName("econfig.xml"); Configuration config = Configuration.getInstance(); timer.end(); timer.print(""); System.out.println(config); }