Help With Api

Question

Hi,
I have a school project to do about a digitial circuit simulator.
i am done most of the parts but i am having a problem with the junit.FrameWork.assert library. The following code gives me an error near assertFalse.
public void testSimpleLine() {
LineParser p = new LineParser();
p.parse("Nand inputInv outputInv");
Node n = Node.getNodeForName("inputInv");
assertFalse(n==null);
n = Node.getNodeForName("outputInv");
assertFalse(n==null);
Can anyone help me resolve the problem

Answer 1

public class LineParser extends Object
    private Simulator simulator = Simulator.getInstance();
    public void parse(String line)
        char[] nodenames = new char[100];
        String [] words = line.split(" ");
        if (words[0].equalsIgnoreCase("nand2"))
            nandoperator(words[1], words[2], words[3]);
        else if (words[0].equalsIgnoreCase("inv"))
            inv(words[1], words[2]);
        else if (words[0].equalsIgnoreCase("set"))
            //simulator.addEvent(new Event(words[1], words[2], words[3]));
        else
            System.out.println ("Invalid request!!");
    public void simulation ()
        /* Simulation loop:
         *   This is "boiler-plate" code; there is no need to change
         *   it.
        Event e;
        int numEvents = 0;
        int maxNE = 100;
        for(; (e = simulator.deleteNextEvent()) != null && numEvents < maxNE;
        numEvents++) {
            System.out.println("Handling event setting Node \t" +            e.getNode() +
            "\t to " + e.getValue() +
            " at " + e.getTime());
            // Inform Node
            Node node = e.getNode();
            node.setValue(e.getValue());
        System.out.println("\nSIMULATION FINISHED");
        System.out.println(numEvents + " Events handled");
        if (numEvents >= maxNE)
            System.out.println("Simulation stopped because " +
        "max number of events met");
    private void nandoperator(String inputone, String inputtwo, String output)
            //make the nand2 nodes
            Node one = new Node (0, inputone);
            Node two = new Node (0, inputtwo);
            Node onenandtwo = new Node (1, output);
            //make the nand2 block
            Node [] insNand2 = {one, two}; 
//Create an array of the input Node(s)
            Block nand2 = new Nand(insNand2, onenandtwo, 10);  //Create the Block
    private void inv (String input, String output)
            Node one = new Node (0, input);
            Node notone = new Node (1, output);
            Node [] insNand1 = {one};  //Create an array of the input Node(s)
            Block nand1 = new Nand(insNand1, notone, 10);  //Create the Block
}