ArrayIndexOutOfBoundsException ( Partition )

[JanineXD]

I was browsing the web for examples on how to partition in Java. I've got to this website that has a detailed example about Partitioning so I've tried to run it on my JCreator Pro.

I've only got one error, but I've tried all I can do to fix it ( Put BufferedReader, import java.io.*, throws IOException ), and It still wouldn't work.

Here's the Error:

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
    at Partition.main(Partition.java:19)

Here's the Code:

public class Partition { 
 
    public static void partition(int n) {
        partition(n, n, "");
    }
    public static void partition(int n, int max, String prefix) {
        if (n == 0) {
            StdOut.println(prefix);
            return;
        }
 
        for (int i = Math.min(max, n); i >= 1; i--) {
            partition(n-i, i, prefix + " " + i);
        }
    }
 
 
    public static void main(String[] args) { 
        int N = Integer.parseInt(args[0]);
        partition(N);
    }
 
}
 

Thank You!

[Nepomuk]

The exception is thrown here:

public static void main(String[] args) { 
   int N = Integer.parseInt(args[0]);
   partition(N);
}

which probably means, you're calling the program without any arguments. I'm not quite sure how to call it with arguments in JCreator Pro (though I'm sure you can find that), but in any case you should catch that mistake by changing it to something like

public static void main(String[] args) { 
   if(args.length > 0) {
      int N = Integer.parseInt(args[0]);
      partition(N);
   }
   else
      System.out.println("Partition called without any arguments.");
}

Greetings,
Nepomuk