gistfile1.java

        final Collection<Integer> ids =
                Collections2.filter(Lists.transform(Arrays.asList(
                        input.split(",")),
                        new Function<String, Integer>() {
                            @Override
                            public Integer apply(@Nullable final String s) {
                                return s != null ? Ints.tryParse(s) : null;
                            }
                        }), new Predicate<Integer>() {
                    @Override
                    public boolean apply(@Nullable final Integer aLong) {
                        return aLong != null;
                    }
                });