LinkedList<LinkedList<YourClass>> list = new LinkedList<LinkedList<YourClass>>();

LinkedList<LinkedList<YourClass>> list = new LinkedList<>();

list.add(new LinkedList<YourClass>());

list.get(sublistIndex).add(new YourClass());

for(LinkedList<YourClass> sublist : list) {
    for(YourClass o : sublist) {
        // your code here
    }
}