array index out of bounds : 0 problem

[dorien]

Hi,

I'm working on a schoolproject where I need to solve freecell automatically with a program. I found a program online, but now I get this error message: Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0

This is the part of the code that gives the error:

public static void main(String[] args) throws IOException {

Comparator<short[]> comp = FreeCellNode.comparator();

Scanner sc = new Scanner(new File(args[0]));
while (sc.hasNext()) {
int dealNumber = sc.nextInt();

System.out.println("Searching board:" + dealNumber);
FreeCellNode fcn = Deal.initialize(new File ("32000.txt"), dealNumber);
System.out.println(fcn.toString());

AnalyzeState st = new AnalyzeState();
DFS<short[]> dfs = new DFS<short[]>(st);
Result res = dfs.fullSearch(fcn, Deal.goal(), comp);

Stack<IMove> sol = res.solution();
System.out.println("Solution has " + sol.size() + " moves.");

System.out.println(" Total number of states: " + dfs.getCounter());
st.report();


I've tried to solve it myself, but I don't understand how an array can be out of bounds when you're calling index 0?
Can anyone please help me?

Cheers,
Dorien

[Tolls]

Please use [code] tags [/code] when posting code.

Also, please post the full exception text, including stack trace, highlighting the line in your code from which it is thrown.

[Norm]

java.lang.ArrayIndexOutOfBoundsException: 0

The error is from trying to access an empty array. There is no element in the first position: 0
You should test the array's length before trying to access its elements.

[JosAH]

That program needs a command line argument; what that argument means is up to you ...

kind regards,

Jos

[awinston]

I'm working on a schoolproject where I need to solve freecell automatically with a program. I found a program online

Does your school assignment really require finding a program online?

[dorien]

Hi,
thank you for your quick replies!

I think I figured it out now, with your help: The array is empty because I didn't give a command line argument.

Does your school assignment really require finding a program online?

This is just part of my project. I have to test if the symptoms of dementia can be detected by using digital games. I want to use the solver for freecell to compare with the users solution.

Thanks!
Dorien