Finding all objects that have a given property inside a collection [duplicate]

Answer 1

Use Google Guava.

final int lastSeq = myCollections.size();
Clazz target = Iterables.find(myCollections, new Predicate<Clazz>() {
    @Override
    public boolean apply(@Nullable Clazz input) {
      return input.getSeq() == lastSeq;
    }
});

I think to use this method.

Answer 2

you can search item from a list as follows function. good luck!

int _searchList(List<T> list,T item) {
int idx = -1;
idx = Collections.binarySearch(list,item,
        new Comparator<T>() {
            public int compare(Titm1,
                    Titm2) {

                // key1
                if (itm1.key1.compareTo(itm2.key1) != 0) {
                    return itm1.key2.compareTo(itm2.key2);
                }

                // key2
                return itm1.key2
                        .compareTo(itm2.key2);
            }
        });

return idx;

}