public class HelloWorld {
    public static void main(String [] args) {
        char[] b = {'a', 'b', 'a', 'c'};
        int p = 4;
        deleteRepeats(b, p);
    }

    public void deleteRepeats(char[] a, int size) {
        int currentElement;
        currentElement = 0;
        do {
            for (int i = currentElement; i < size-1; i++) {
                if (a[currentElement] == a[i+1]) a[i+1] = ' ';
            }
            currentElement++;
        } while (currentElement < size-1);
    }
}

I get the error:

non-static method deleteRepeats(char[],int) cannot be referenced from a static context deleteRepeats(b,p);

Can someone tell me what this means?

I tried removing "static" from the main method, but I get the error:

Exception in thread "main" java.lang.NoSuchMethodError: main.

Thanks in advance