public class CompStack<A extends Comparable<A>> extends Stack<A> {
    public String toString() {
        return super.toString() + (isIncreasing() ? "" : "not ")+"increasing";
    }
    public boolean isIncreasingSlow() {
        for (int i=1; i<tos; i++)
            // if (a[i-1].compareTo(a[i]) >= 0)
            if (((A)(((Object[])a)[i-1])).compareTo((A)(((Object[])a)[i]))>=0)
            // if (((Comparable<A>)(a[i-1])).compareTo(((Comparable<A>)(a[i]))) >= 0)
                return false;
        return true;
    }
    public boolean isIncreasing() {
        return isIncreasingSlow();
    }
}