getString（“ K”）是否能够从json对象提取int值？

Question

I am trying to understand why getString is used to parse integer value from JSON Object

i looked in the official documentation and it says:

getString

public String getString (String name)

Returns the value mapped by name if it exists, coercing it if necessary, or throws if no such mapping exists.

The json file is here

please note that "id" : has integer value

and here is the code in MainActivity

// looping through all Contacts
for (int i = 0; i < pokemons.length(); i++) {
    //TODO: get the JSONObject and its three attributes
    JSONObject c = pokemons.getJSONObject(i);
    String name = c.getString("name");
    >>>  String id = c.getString("id");    <<<
    String candy = c.getString("candy");

    // tmp hash map for a single pokemon
    HashMap<String, String> pokemon = new HashMap<>();

    // add each child node to HashMap key => value
    pokemon.put("name", name);
    pokemon.put("id", id);
    pokemon.put("candy", candy);

    // adding a pokemon to our pokemon list
    pokemonList.add(pokemon);
}

Shouldn't it be getInt() instead of getString() ? because as you see in the json file id: is a key to an int value ! i tried parsing it with getInt() and assign it to an int variable and it worked too!!

NOTE that code is from a tuturial on http networking and it is working as intended without crash or error and it is not my code.

Answer 1

It should be getInt(String name) and you should change it. Or you can use optInt(String name, int fallback) also. Documentation is here

Also, if you change it then you will have to change

pokemon.put("id", id);

to either

pokemon.put("id", id + ""); or pokemon.put("id", String.valueOf(id));

because your HashMap expects a string in the value field.

Answer 2

you can use

int id = c.getInt("id"); 

JsonObject has method with name getInt()