將二維數組讀入arraylist中

Question

如何基於二維數組創建ArrayList<Object> pointsdatapoints？

Anothor問題：如果datapoints是二維ArrayList，如何將第一列讀入lat並將第二列讀入lon？

public class Cluster { 
    private ArrayList<VisitPoint> points; 

    public Cluster(List[][] datapoints) { 
     Float lat; 
     Float lon; 
     for (int i=0; i<datapoints.length; i++) { 
      lat = datapoints[i][0]; 
      lon = datapoints[i][1]; 
      points.add(new VisitPoint(lat,lon)); 
     } 
    } 

    public ArrayList<VisitPoint> getVisitPoints() { 
     return points; 
    } 

} 

Answer 1

你可以使用的ArrayListList。這是

List<List<VisitPoint>> list = new ArrayList<List<VisitPoint>>(); 

前迭代 -

for (List<VisitPoint> list2 : list) { 
    for (VisitPoint visitPoint : list2) { 
     ... 
    } 
}