// Import classes:
//import com.gitee.sdk.gitee5j.ApiClient;
//import com.gitee.sdk.gitee5j.ApiException;
//import com.gitee.sdk.gitee5j.Configuration;
//import com.gitee.sdk.gitee5j.auth.*;
//import com.gitee.sdk.gitee5j.api.EmailsApi;

ApiClient defaultClient = Configuration.getDefaultApiClient();

// Configure OAuth2 access token for authorization: OAuth2
OAuth OAuth2 = (OAuth) defaultClient.getAuthentication("OAuth2");
OAuth2.setAccessToken("YOUR ACCESS TOKEN");

EmailsApi apiInstance = new EmailsApi();
try {
    List<UserEmail> result = apiInstance.getEmails();
    System.out.println(result);
} catch (ApiException e) {
    System.err.println("Exception when calling EmailsApi#getEmails");
    e.printStackTrace();
}