I keep getting this error: "cannot resolve symbol - constructor MyFileStructure()". I do have a class with that name, and in fact, the first time I tried to compile the code below, BlueJ even drew the arrow to the class. So why then can it not friggin see it? I even copy and pasted to make sure I had no dumb spelling mistakes in the class name.

Code:
    public static void main(String[] args)
    {
        if(args.length != 0)
        {
            MyFileStructure mf = new MyFileStructure();
            mf.setDirName(args[0]);
            mf.build();
            mf.list();
        }
    }