private static Properties mergeProperties(Properties overrideProperties,Properties properties){
  Properties merged=new Properties();
  if (properties != null)   merged.putAll(properties);
  if (overrideProperties != null)   merged.putAll(overrideProperties);
  return merged;
}

private static Properties mergeProperties ( Properties overrideProperties , Properties properties ) { Properties merged = new Properties ( ) ; if ( properties != null ) merged . putAll ( properties ) ; if ( overrideProperties != null ) merged . putAll ( overrideProperties ) ; return merged ; }
merges two properties files .
