Arraylist showing this value PlanetData@adf4bee instead of added value

Question

I'm not exactly sure if my topic is asking the right question but the situtation is this. I working on an app that is performing multiple calculations in separate classes. The calculations are being done correctly and I am able to see that they are in logcat. Now I want to display them in recyclerview and to do that I am trying to add them to an arraylist before doing a recyclerview. My arraylist is getting the values displayed in the title and its not showing in my recyclerview. Here is are my codes but based on the research I looked up I cant see what I am doing wrong.

ArrayList Code:

public class PlanetData {
private String planetRA;

private PlanetData(String planetRA){
    this.planetRA = planetRA;
}

public String getPlanetRA(){
    return planetRA;
}

public void setPlanetRA (String planetRA){
    this.planetRA = planetRA;
}

public static void main(String [] args){
        List<PlanetData> planetvalues = new ArrayList<>();

        planetvalues.add(new PlanetData("12"));
        planetvalues.add(new PlanetData(Double.toString(Mercury.getMercuryRA())));
        planetvalues.add(new PlanetData(Double.toString(Venus.getVenusRA())));
        planetvalues.add(new PlanetData(Double.toString(Moon.getMoonRA())));
        planetvalues.add(new PlanetData (Double.toString(Mars.getMarsRA())));
        planetvalues.add(new PlanetData(Double.toString(Jupiter.getJupiterRA())));
        planetvalues.add(new PlanetData(Double.toString(Saturn.getSaturnRA())));
        planetvalues.add(new PlanetData(Double.toString(Uranus.getUranusRA())));
        planetvalues.add(new PlanetData(Double.toString(Neptune.getNeptuneRA())));
        planetvalues.add(new PlanetData(Double.toString(Pluto.getPlutoRA())));

            System.out.println("This is the arraylist" + planetvalues);

}




        }

RecyclerView Adapter

      public class PlanetRecyclerViewAdapter extends RecyclerView.Adapter<PlanetRecyclerViewAdapter.ViewHolder> {

    List<PlanetData> mPlanetDataList;
    Context mContext;

    public static class ViewHolder extends RecyclerView.ViewHolder{

        public TextView currentRA;

        public ViewHolder(View itemView) {
            super(itemView);

            currentRA = (TextView) itemView.findViewById(R.id.planet_location);


        }

    }

    public PlanetRecyclerViewAdapter(List<PlanetData> mPlanetDataList, Context mContext){
        this.mPlanetDataList = mPlanetDataList;
        this.mContext = mContext;
    }

    @Override
    public PlanetRecyclerViewAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.planet_recycler_item,parent, false);



        return new ViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder( PlanetRecyclerViewAdapter.ViewHolder holder, int position) {
    holder.currentRA.setText(mPlanetDataList.get(position).getPlanetRA());


    }

    @Override
    public int getItemCount() {
        return mPlanetDataList.size();
    }
   }

Fragment Activity

public class TestFragment extends Fragment {
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
private TextView planetLongitude;
private TextView planetLatitude;
private TextView planetTime;
private TextView SunRA;
private TextView SunDEC;
RecyclerView mRecyclerView;
PlanetRecyclerViewAdapter adapter;
List<PlanetData> items = new ArrayList<>();

// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;

Mercury test;

private OnFragmentInteractionListener mListener;

public TestFragment() {
    // Required empty public constructor
}

/**
 * Use this factory method to create a new instance of
 * this fragment using the provided parameters.
 *
 * @param param1 Parameter 1.
 * @param param2 Parameter 2.
 * @return A new instance of fragment TestFragment.
 */
// TODO: Rename and change types and number of parameters
public static TestFragment newInstance(String param1, String param2) {
    TestFragment fragment = new TestFragment();
    Bundle args = new Bundle();
    args.putString(ARG_PARAM1, param1);
    args.putString(ARG_PARAM2, param2);
    fragment.setArguments(args);
    return fragment;
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);



    if (getArguments() != null) {
        mParam1 = getArguments().getString(ARG_PARAM1);
        mParam2 = getArguments().getString(ARG_PARAM2);



    }

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_test, container, false);


    mRecyclerView = (RecyclerView)view.findViewById(R.id.planet_recycler_view);
    mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
    mRecyclerView.addItemDecoration(new DividerItemDecoration(mRecyclerView.getContext(),DividerItemDecoration.VERTICAL));

    adapter = new PlanetRecyclerViewAdapter(items, mRecyclerView.getContext());
    mRecyclerView.setAdapter(adapter);




        return view;
    }

In my logcat I'm getting the following response in my arraylist: 11-10 22:02:52.581 13826-13826/com.ksburneytwo.planetmathtest I/System.out: This is the arraylist[com.ksburneytwo.planetmathtest.PlanetData@adf4bee, com.ksburneytwo.planetmathtest.PlanetData@24a088f, com.ksburneytwo.planetmathtest.PlanetData@5bb671c, com.ksburneytwo.planetmathtest.PlanetData@5dd9f25, com.ksburneytwo.planetmathtest.PlanetData@17838fa, com.ksburneytwo.planetmathtest.PlanetData@ce89eab, com.ksburneytwo.planetmathtest.PlanetData@2a5d908, com.ksburneytwo.planetmathtest.PlanetData@cee08a1, com.ksburneytwo.planetmathtest.PlanetData@580eac6, com.ksburneytwo.planetmathtest.PlanetData@a907a87]

The values should be my the results of my calculations.

you have to override toString() method in PlanetData class in-order to see those values. — sarath kumar, Nov 11 '18 at 03:51
You should override `toString()` method for your array list. — PradyumanDixit, Nov 11 '18 at 03:51

score 1 · Accepted Answer · answered Nov 11 '18 at 03:54

By default, toString() method would result in packagename.ClassName@hashcode.

In your PlanetData class, you need to override toString() method, so that it can return the appropriate fields and their values.

You can generate toString() method using your IDE and choose what fields you want to include in the output.

Arraylist showing this value PlanetData@adf4bee instead of added value

1 Answers1