查找目录中所有文件的最大值

Question

有没有办法将目录中每个文本文件中的最大值保存到一个列表中？我有多个相同格式的文本文件，其中每个值在不同的行上：

（第一分）

（第二分）

（第三分）

我想将这三个整数中最大的整数保存到一个列表中，对于该文件夹中的所有其他文件也是如此。这可能吗？

Answer 1

这是一种方法。

public class CurrentTimetables extends Fragment {
    RecyclerView recyclerView;
    static MusicRecyclerAdapter adapter;
    RecyclerView.LayoutManager layoutManager;
    ArrayList<Timetables> list;

    public CurrentTimetables(){

    }

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

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.currenttimetable, container, false);
        recyclerView = (RecyclerView) rootView.findViewById(R.id.timetablerecyclerView);
        recyclerView.setHasFixedSize(true);
        list = new ArrayList<Timetables>();
        adapter = new MusicRecyclerAdapter(list, CurrentTimetables.this);
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity().getApplicationContext());
        linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        recyclerView.setLayoutManager(linearLayoutManager);
        recyclerView.setAdapter(adapter);
        tabBackground = new TabBackground(CurrentTimetables.this, list, spinnerItems, adapter, spinnerAdapter);
        tabBackground.populateConditionsList();
        inputs = new ArrayList<>();
        populate();
        return rootView;
    }

    @Override
    public void onResume() {
        super.onResume();
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {

    }

    @Override
    public void onStart() {
        super.onStart();
    }

    public void populate(){
        String dbURL = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
        RequestQueue requestQueue = Volley.newRequestQueue(fragment.getActivity());
        JsonArrayRequest jsonArrayRequest = new JsonArrayRequest
                (dbURL, new Response.Listener<JSONArray>(){

                    @Override
                    public void onResponse(JSONArray jsonArray) {
                        if(!list.isEmpty()){
                            list.clear();
                        }
                        try {
                            for (int i = 0; i < jsonArray.length(); i++) {
                                JSONObject jsonObject = jsonArray.getJSONObject(i);

                                int timetableID = Integer.parseInt(jsonObject.getString("timetableID"));
                                String timetableName = jsonObject.getString("timetableName");
                                String subjectName = jsonObject.getString("subjectName");

                                Timetables timetables = new Timetables(timetableID, timetableName, subjectName);
                                list.add(timetables);
                                adapter.notifyDataSetChanged();
                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                }, new Response.ErrorListener(){

                    @Override
                    public void onErrorResponse(VolleyError volleyError) {

                    }
                }
                );
        requestQueue.add(jsonArrayRequest);
    }
 }

您遍历目录中的所有文件，删除线条，将它们转换为int并从中获取最大值。