How do I pass a class as an argument to a method?

Question

In the code below I want to pass the 'Races.class' as an argument to the method 'getAllRaces()'. How do I do this?

public static void getAllRaces() throws ClientProtocolException, IOException 
{
    Response myReponse = APIExecutor.getRequest("/races");
    GsonBuilder builder  = new GsonBuilder();
    Gson gson = builder.serializeNulls().setPrettyPrinting().create();

    Races races = gson.fromJson(myReponse.getReqResponse(), Races.class);
    ...
}

What's the question / issue? Looks like you've already done it.... — Brick, Sep 21 '17 at 00:23
All the relevant info is provided by the [javadocs](https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html). — , Sep 21 '17 at 00:25
I have updated my question. Here i want to pass the 'Races.class' as an argument to the method 'getAllRaces()'. — Hashili, Sep 21 '17 at 00:26

score 3 · Accepted Answer · answered Sep 21 '17 at 00:27

3

Change your method to:

public static void getAllRaces(Class<?> clazz) {
    ...
    Races races = gson.fromJson(myReponse.getReqResponse(), clazz);
    ...
}

You can call it thus:

getAllRaces(Races.class)

answered Sep 21 '17 at 00:27

dave

11,641
5
47
65

thanks @dave .This solved my issue – Hashili Sep 21 '17 at 00:35
No problem. Happy to help. – dave Sep 21 '17 at 00:41

score 1 · Answer 2 · answered Sep 21 '17 at 00:29

1

Races.class as an object of type Class<Races>. In your case, you can use a ? capture to pass a class of unknown type:

public static void getAllRaces(Class<?> raceClass) {
    //...
}

answered Sep 21 '17 at 00:29

rhobincu

906
1
7
22

thanks .This solved my issue – Hashili Sep 21 '17 at 00:35

How do I pass a class as an argument to a method?

2 Answers2