I want to create a multidimensional array where each of the nodes will have the following details:
Which is the best way to do this when I have over 30 values ?
Example:
"Bangalore", "200", "city"
"Mysore", "100", "historic"
I am trying to populate a list array in Android where each row has three details - name, icon, distance so I want to temp populate that data in my java class.
Don't use a multidimensional array. Use a simple array (or List) of objects:
public class Place {
private String name;
private String icon;
private int distance;
// constructor, methods skipped for brevity
}
...
private Place[] places = new Place[10];
// or
private List<Place> places = new ArrayList<Place>();
Java is an OO language. Learn to define and use objects.
I think best option is create custom defined object.
Class TestObject
{
String Place,Icon,Distance;
// Setter and Getter method
}
// Create object of class. Store your value using setter and getter method
and save object into list
List<TestObject> test = new ArrayList<TestObject>();
test.add(testObject); //
Create a class with the attributes that you want in an element.
now you can create an array of objects of this class.
class Place {
private String name;
private String icon;
private int distance;
public Place(String name,String icon,int distance){
this.name=name;
this.icon=icon;
this.distance=distance;
}
}
Place places[]=new Place[10];
places[0]=new Place("Mysore","wildlife",123);
and so on
beware of instantiating the objects else you will endup getting NullPointerException
If you don't want to create a separate class . You can also use JSON for your purpose.
JSON object is light weight and can manage aaray data very easily.
Like :
JSONObject jo = new JSONObject();
JSONArray ja = new JSONArray();
ja.put("Mysore");
ja.put("wildlife");
ja.put(123);
jo.add(KEY, ja); // Adding array to JSON Object with key [KEY can be any unique value]
JSON are easy to read and manageable.
It provides lots of functionality rather than array.
