class myFileReaderThatStarts with arguments
{
class MissingArgumentException extends Exception{
MissingArgumentException(String s)
{
super(s);
}
}
public static void main(String[] args) throws MissingArgumentException
{
//You can test args array for value
if(args.length>0)
{
// do something with args[0]
}
else
{
// default in a path
// or
throw new MissingArgumentException("You need to start this program with a path");
}
}