具有多个值的Java数组

Question

I want to create a multidimensional array where each of the nodes will have the following details:

1. Place Name ex: "Mysore" , "Bangalore"
2. Icon name ex: "waterfall", "wildlife"
3. Place Distance ex: "200", "123"

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.

Answer 1

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.

Answer 2

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); //

Answer 3

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

Answer 4

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.