Use the code snippet below and plug in your API key. The API key is available on your **Organization Settings** page, on the **APIs** tab. The API key is of type `sdk`. For more information, see [Understanding API Keys](https://help.example.com/hc/en-us/articles/API-keys).<div>{{# tab label="Java" }}` ` `javaimport com.example.FactoryBuilder;import com.example.Client;import com.example.ClientConfig;import com.example.Factory; ClientConfig config = ClientConfig.builder()   .setBlockUntilReadyTimeout(10000)    .build(); Factory factory = FactoryBuilder.build("YOUR_API_KEY", config);Client client = factory.client();try {    client.blockUntilReady();} catch (TimeoutException | InterruptedException e) {    // log & handle }` ` `{{/ end }}</div>Now you can start asking the SDK to evaluate treatments for your customers.# Using the SDK ## Basic useUse an if-else-if block as shown below and insert the code for the different treatments that you defined in the UI. Remember the final else branch in your code to handle the client returning the [control treatment](https://example.com/hc/en-us/articles/Control-treatment).