public static boolean getBool(String key, String defaultValue) {
        return Boolean.parseBoolean(System.getProperty(key, defaultValue));
    }
public static boolean getBool(String key, String defaultValue) {
        return Boolean.parseBoolean(System.getProperty(key, defaultValue));
    }
public static boolean getBool ( String key , String defaultValue ) { return Boolean . parseBoolean ( System . getProperty ( key , defaultValue ) ) ; }
~~~ public helper methods to retrieve system property
~~~ public helper methods to retrieve system property