code: public static Integer getIntegerProperty(String key, boolean required) {
  		Integer value = null;
  		String stringValue = getProperty(key, required);
  		if (stringValue != null) {
  			value = Integer.valueOf(stringValue);
  		}
  		return value;
  	}
docs: Get an integer property by key
  
  @param key
  key
  @param required
  required flag
  @return property value