Java class for implementing a SAX Parser with inner classes

[lodeaqui]

For a college assignment I need to write a SAX parser and a filter that reads the original XML file then creates a new modified one. The assignment requires that my program need to be run by console with "java Sax inputFileDestination OutputFileDestination" and it requires that there is only one file. I means I need to implement the interfaces with in the Sax.java. I am familiar with the inner classes but I dont know how to implement this with a main method in the outer class.Any sugestions?