# Exceptions

When you make a request via the SDK, there is a chance of request failing due to various reasons. When such a failure happens, an exception corresponding to the error occurred is thrown.

***

**Possible Exceptions**

* `BadRequestException` If the request returns with status code `400`
* `UnauthorizedException` If the request returns with status code `401`
* `ForbiddenException` If the request returns with status code `403`
* `NotFoundException` If the request returns with status code `404`
* `MethodNotAllowedException` If the request returns with status code `405`
* `TooManyRequestsException` If the request returns with status code `429`
* `PleaseContactBunqException` If the request returns with status code `500`. If you get this exception, please contact us preferably via the support chat in the bunq app.
* `UnknownApiErrorException` If none of the above mentioned exceptions are thrown, this exception will be thrown instead.

For more information regarding these errors, please take a look on the documentation page here: 

{% content-ref url="../../../../basics/errors" %}
[errors](https://doc.bunq.com/basics/errors)
{% endcontent-ref %}

***

**Base exception**

All the exceptions have the same base exception which looks like this:

```java
public class ApiException extends RuntimeException {
  
  private int responseCode;

  public ApiException(String message, int responseCode) {
    // Some hidden code    
  }

  public int getResponseCode() {
    return responseCode;
  }

}
```

This means that each exception will have a response code and an error message related to the specific error returned by API.

***

**Exception handling**

Since each API error has a distinct SDK exception type corresponding to it, you can catch the exact exceptions you expect 👏.

```java
import com.bunq.sdk.context.ApiContext;
import com.bunq.sdk.context.ApiEnvironmentType;
import com.bunq.sdk.exception.BadRequestException;

class BadRequest {
  private final String API_KEY = "Some invalid key";
  private final String DESCRIPTION = "This will throw BadRequestException.";
  
  public void main(){
    try{
      new ApiContext(ApiEnvironmentType.SANDBOX, this.API_KEY, this.DESCRIPTION);
    }catch (BadRequestException error){
      System.out.println(error.getMessage());
      System.out.println(error.getResponseCode());
    }
  }
  
}
```