How to load multiple configuration files using apache common configuration(java)

Question

I have a main conf file which I load using apache common configuration class. I have a requirement where user can specify a conf file and values in those file will override the

Answer 1

PropertiesConfiguration has a method copy(Configuration c) which copies the content of the specified configuration into this configuration. If the specified configuration contains a key that is also present in this configuration, the value of this key will be replaced by the new value.