import java.time.LocalDate;

LocalDate myDate = LocalDate.parse("2019-12-06");

import java.time.OffsetDateTime;

OffsetDateTime myDateTime = OffsetDateTime.parse("2019-12-06T22:35:49+00:00");

private PlaidApi plaidClient;

HashMap<String, String> apiKeys = new HashMap<String, String>();
apiKeys.put("clientId", plaidClientId);
apiKeys.put("secret", plaidSecret);
apiClient = new ApiClient(apiKeys);
apiClient.setPlaidAdapter(ApiClient.Sandbox); // or equivalent, depending on which environment you're calling into
plaidClient = apiClient.createService(PlaidApi.class);

// Synchronously exchange a Link public_token for an API access_token
// Required request parameters are always Request object constructor arguments
ItemPublicTokenExchangeRequest request = new ItemPublicTokenExchangeRequest().publicToken("the_link_public_token");
Response<ItemPublicTokenExchangeResponse> response = plaidClient()
    .itemPublicTokenExchange(request).execute();

if (response.isSuccessful()) {
  accessToken = response.body().getAccessToken();
}


// Asynchronously do the same thing. Useful for potentially long-lived calls.
ItemPublicTokenExchangeRequest request = new ItemPublicTokenExchangeRequest().publicToken(publicToken);
plaidClient()
    .itemPublicTokenExchange(request)
    .enqueue(new Callback<ItemPublicTokenExchangeResponse>() {
        @Override
        public void onResponse(Call<ItemPublicTokenExchangeResponse> call, Response<ItemPublicTokenExchangeResponse> response) {
          if (response.isSuccessful()) {
            accessToken = response.body.getAccessToken();
          }
        }

        @Override
        public void onFailure(Call<ItemPublicTokenExchangeResponse> call, Throwable t) {
          // handle the failure as needed
        }
    });


// Decoding an unsuccessful response
try {
  Gson gson = new Gson();
  PlaidError error = gson.fromJson(response.errorBody().string(), PlaidError.class);
} catch (Exception e) {
  throw new Exception(
    String.format(
      "Failed converting from API Response Error Body to Error %f",
      response.errorBody().string()
    )
  );
}