Program that must accept input redirection

[static_rage]

Hello all

I've been using Java for a while now but this is the first instance I've had dealing with input redirection and I'm at point where I don't know what to do, I can't seem to find much information on how to achieve this and no tutors or lecturers are replying to my emails ( obviously they don't know either ). I have a program that should read in some input and then from that, construct an adjacency list for an undirected graph. I've got the program working to the point where if I run it, copy and paste the contents of a small .txt file and enter it, the desired output is shown. So the program works. However, I have to submit it into my university's auto marker which runs the file through a command line. The auto marker uses java graphs1 < test.txt as its input to the program. If I open up command prompt and attempt to do the same, I get the error message saying "Exception in thread "main" java.lang.NoClassDefFoundError: graphs1 (wrong name: A4/graphs1)."

My program accepts input like so

public static void main(String[] args) throws IOException{
      
        try{
        BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
        while(input != null){
            GraphAdjMatrix gAM = new GraphAdjMatrix(input);
            uGraphLists uG = new uGraphLists(gAM);
            System.out.print(uG);
        }
        input.close();
        }
        catch(NumberFormatException e){
            
        }
    }

What should I be changing or doing differently to get the command line method to work? Any hints or tips?

Any help is greatly appreciated.

[Tolls]

Your graphs1 class is apparently in a package called A4, so you should either remove it from the package, or run it from the directory containing the A4 directory using:
java A4.graphs1 < test.txt