Migrate from android paging library 2 to paging 3

I am building chat app where i am using Room,ViewModel,PagedListAdapter and it's works perfectly but now i want to upgrade my app to Paging Library 3 which caused real pain. I tried to follow official guide of Android but still not able to migrate from lib 2 to version 3 of paging and most of the tutorial are in kotlin when i am using Java in my project.

I start from changing PagedListAdapter to PagingDataAdapter which cause error at main activity

Chat_ViewModel viewModel = new ViewModelProvider(this).get(Chat_ViewModel.class);

       viewModel.chatList.observe(getViewLifecycleOwner(), new Observer<PagedList<ChatEntity_TableColums>>() {

            @Override
            public void onChanged(PagedList<ChatEntity_TableColums> chatEntity_tableColums) {
                Log.d(TAG, "onChanged: Chat Entity = " + chatEntity_tableColums.size());
                adapter.submitList(chatEntity_tableColums); // cannot resolve Submitlist
            }
        });

Then i also tried to upgrade Viewmodel by changing public final LiveData<PagedList<ChatEntity_TableColums>> chatList; to LiveData<PagingData<ChatEntity_TableColums>> chatList; then it cause error in it's constructor,where i cannot find replacement.

public class Chat_ViewModel extends ViewModel {
   private static final String TAG = "Chat View Model";
    public final LiveData<PagedList<ChatEntity_TableColums>> chatList;


    public Chat_ViewModel() {
        chatList = new LivePagedListBuilder<>(
                ChatRoomDatabase.getInstance(MyApplication.getmContext(),1).chatDAO().getPaginationChat(String.valueOf(Session.getOtherUserID())),20).build();
}

    }

This is a query from where i am retrieving the data. I am using default DataSource.Factory to get data from Room @Query("SELECT * FROM Chat WHERE RECEIVER_USER_ID = :UserID ORDER BY ID DESC") DataSource.Factory<Integer, ChatEntity_TableColums> getPaginationChat(String UserID);

Please guide me bit to update my project into paging library 3 with Java

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