Filtering without Lambda.

CollectionUtils.java

public class CollectionsUtils {
    public static void remove(List<?> items, Filter<Object> filter) {
        Iterator<?> iterator = items.iterator();
        while (iterator.hasNext()) {
            if (filter.shouldRemove(iterator.next())) {
                iterator.remove();
            }
        }
    }
}

Filter.java

public interface Filter<T> {
    public boolean shouldRemove(T t);
}

FilteredMap.java

List<Map.Entry<String, Object>> list = new ArrayList<Map.Entry<String, Object>>(entries);
//remove negative values
CollectionsUtils.remove(list, new Filter<Object>() {
    public boolean shouldRemove(Object o1) {
        Map.Entry<String, Object> entry = (Map.Entry<String, Object>)o1;
        Double d1 = Double.parseDouble(entry.getValue().toString());
        return d1<0.25;
    }
});

I wanted a general way to filter collections without using Java 8 which is not on my servers.