如何迭代列表<Object>或获取列表元素？

Question

我正在使用Firebase工作在一个Android项目中，我想获取有关酒吧的信息，我想我正确地获取数据，但我在数据库结构中有一些节点，例如该节点中的“营业时间”打开和关闭欢乐时光的小时，开始和结束时间。我检索该节点在List<Object>这样的：

这是我ValueEventListener

ValueEventListener valueEventListener = new ValueEventListener() { 
    @Override 
    public void onDataChange(DataSnapshot dataSnapshot) { 
     // Get Post object and use the values to update the UI 
     long value = dataSnapshot.getChildrenCount(); 
     Log.d("Bar", "No. of children: " + value); 

     for (DataSnapshot districtSnapshot: dataSnapshot.getChildren()) { 
      String district = districtSnapshot.getKey(); 

      for (DataSnapshot barSnapshot: dataSnapshot.child(district).getChildren()) { 

       Bar bar = barSnapshot.getValue(Bar.class); 
       String name = bar.getName(); 
       String address = bar.getAddress(); 
       List<String> photos = bar.getPhotos(); 
       List<Object> hours = bar.getHours(); 
       double latitude = bar.getLatitude(); 
       double longitude = bar.getLongitude(); 

       barsList.add(new Bar(name, address, latitude, longitude, photos)); 

       Log.d("Bar", "Lat: " + latitude); 
       Log.d("Bar", "Long: " + longitude); 
       Log.d("Bar", "Photos: " + photos.toString()); 
       Log.d("Bar", "Hours String: " + hours.toString()); 
      } 
     } 
    } 

    @Override 
    public void onCancelled(DatabaseError databaseError) { 
     Log.w(TAG, "loadPost:onCancelled", databaseError.toException()); 
    } 
}; 

mPostReference.addListenerForSingleValueEvent(valueEventListener); 

在Log.d("Bar", "Hours String: " + hours.toString());我得到的阵列正确的信息，但我只是不知道如何将其转换为一种方法可以例如happyStart选择：

时间字符串：[{happyStart = 17，happyEnd = 19，开放= 17，靠近= 2}， {happyStart = 17，happyEnd = 18，开= 16，close = 2}]

请帮帮我。提前致谢！

UPDATE，加入酒吧类：

@IgnoreExtraProperties 
public class Bar { 
    private String address; 
    private String name; 
    private double latitude; 
    private double longitude; 
    private List<Object> hours; 
    private List<Object> beers; 
    private List<String> photos; 

    public Bar() { } 

    public Bar(String name, String address, double latitude, double longitude, List<String> photos) { 
     this.name = name; 
     this.address = address; 
     this.photos = photos; 
    } 

    @Exclude 
    public Map<String, Object> toMap() { 
     HashMap<String, Object> result = new HashMap<>(); 
     result.put("name", name); 
     result.put("address", address); 
     result.put("photos", photos); 
     result.put("hours", hours); 
     result.put("longitude", longitude); 
     result.put("latitude", latitude); 
     result.put("beers", beers); 

     return result; 
    } 

    public String getName() { 
     return name; 
    } 

    public String getAddress() { 
     return address; 
    } 

    public List<Object> getHours() { 
     return hours; 
    } 

    public List<Object> getBeers() { 
     return beers; 
    } 

    public List<String> getPhotos() { 
     return photos; 
    } 

    public double getLatitude() { 
     return latitude; 
    } 

    public double getLongitude() { 
     return longitude; 
    } 
}