Sort Multiple Fields With Collections.sort

ComparatorChain chain = new ComparatorChain();
Comparator comp = new BeanComparator("firstname", new NullComparator(true));
chain.addComparator(comp,true);
comp = new BeanComparator("lastname", new NullComparator(true));
chain.addComparator(comp);
Collections.sort(customerlist,chain);


NullComparator(true) <– true places null values at the front of the list
chain.addComparator(comp,true); <– true reverse the list
customerlist = list of dynabeans