How to Validate if a Country is a Member of the European Union (EU) using Java

Simple validation APIs often play pivotal roles in our application logic, tapping external data sources to ensure client-side arguments are true/useable before passing them on to subsequent operations. If your application requires EU membership as a mandatory parameter for certain services, look no further than our EU Validation API: it will provide a Boolean response regarding any input country’s EU membership validity (IsEuropeanUnionMember). It’ll do a lot more than that, too — in your API response, you’ll receive a haul of additional data regarding your input country value (demonstrated below with the example value “Ireland”):

{
  "Successful": true,
  "CountryFullName": "Ireland",
  "ISOTwoLetterCode": "IE",
  "FIPSTwoLetterCode": "EI",
  "ThreeLetterCode": "IRL",
  "IsEuropeanUnionMember": true,
  "Timezones": [],
  "ISOCurrencyCode": "EUR",
  "CurrencySymbol": "€",
  "CurrencyEnglishName": "Euro",
  "Region": "Europe",
  "Subregion": "NorthernEurope"
}

The best part? You can take advantage of this API completely free by registering a free account on our website (this account comes with a limit of 800 API calls per month, with zero commitments/overage penalties — perfect for getting small scale projects/startups off the ground). Below, I’ll demonstrate how you can structure your API call using ready-to-run Java code examples from the Cloudmersive API Console page.

Let’s first install the API client. We can do so by first adding a reference to the repository in pom.xml:

<repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>

And then adding one to the dependency:

<dependencies>
<dependency>
    <groupId>com.github.Cloudmersive</groupId>
    <artifactId>Cloudmersive.APIClient.Java</artifactId>
    <version>v4.25</version>
</dependency>
</dependencies>

With installation complete, we can now add the imports to the top of our file:

// Import classes:
//import com.cloudmersive.client.invoker.ApiClient;
//import com.cloudmersive.client.invoker.ApiException;
//import com.cloudmersive.client.invoker.Configuration;
//import com.cloudmersive.client.invoker.auth.*;
//import com.cloudmersive.client.AddressApi;

Now we can call the function. First, however, let’s ensure we structure our argument properly. We only need to include the raw country name (no country codes or abbreviations are required) in a string, like so:

{
  "RawCountryInput": "string"
}

Now we can pass this argument through the below function (after including our API key where indicated by the comments):

ApiClient defaultClient = Configuration.getDefaultApiClient();
// Configure API key authorization: Apikey
ApiKeyAuth Apikey = (ApiKeyAuth) defaultClient.getAuthentication("Apikey");
Apikey.setApiKey("YOUR API KEY");
// Uncomment the following line to set a prefix for the API key, e.g. "Token" (defaults to null)
//Apikey.setApiKeyPrefix("Token");
AddressApi apiInstance = new AddressApi();
ValidateCountryRequest input = new ValidateCountryRequest(); // ValidateCountryRequest | Input request
try {
    ValidateCountryResponse result = apiInstance.addressCheckEUMembership(input);
    System.out.println(result);
} catch (ApiException e) {
    System.err.println("Exception when calling AddressApi#addressCheckEUMembership");
    e.printStackTrace();
}

After that, you’re all set — no more code required.