contains

// ist Element vorhanden?
    public boolean contains(X x) {
        int i = 0;
        boolean found = false;
        while(!found && (i < this.filled)) {
            found = this.comparator.same(this.elements[i], x);
            ++i;
        }            
        return found;
    }

public boolean same(X x1, X x2);

public boolean same(Integer x1, Integer x2) {
        return x1 == x2;
    }