// NovaPAI Java SDK Example
// Maven: add openai-java dependency
// Docs: https://novapai.ai
// pom.xml dependency:
//
// com.openai
// openai-java
// 2.4.0
//
import com.openai.client.OpenAIClient;
import com.openai.client.okhttp.OpenAIOkHttpClient;
import com.openai.models.chat.completions.*;
import java.util.List;
import java.util.Map;
public class NovaPAIExample {
public static void main(String[] args) {
OpenAIClient client = OpenAIOkHttpClient.builder()
.apiKey("your-api-key")
.baseUrl("https://api.novapai.ai/router/v1")
.build();
// ── Basic Chat ──────────────────────────────────────
basicChat(client);
// ── Streaming ───────────────────────────────────────
streamChat(client);
// ── Function Calling ────────────────────────────────
functionCalling(client);
// ── JSON Mode ───────────────────────────────────────
jsonMode(client);
}
static void basicChat(OpenAIClient client) {
ChatCompletion response = client.chat().completions().create(
ChatCompletionCreateParams.builder()
.model("deepseek-v4-pro")
.messages(List.of(
ChatCompletionMessageParam.ofSystem(
ChatCompletionSystemMessageParam.builder()
.content("You are a helpful assistant.")
.build()
),
ChatCompletionMessageParam.ofUser(
ChatCompletionUserMessageParam.builder()
.content("Hello!")
.build()
)
))
.build()
);
System.out.println(response.choices().get(0).message().content().orElse(""));
}
static void streamChat(OpenAIClient client) {
client.chat().completions().createStreaming(
ChatCompletionCreateParams.builder()
.model("deepseek-v4-pro")
.messages(List.of(
ChatCompletionMessageParam.ofUser(
ChatCompletionUserMessageParam.builder()
.content("Tell me a joke")
.build()
)
))
.build()
).stream().forEach(chunk ->
chunk.choices().stream()
.map(c -> c.delta().content().orElse(""))
.forEach(System.out::print)
);
System.out.println();
}
static void functionCalling(OpenAIClient client) {
ChatCompletion response = client.chat().completions().create(
ChatCompletionCreateParams.builder()
.model("deepseek-v4-pro")
.messages(List.of(
ChatCompletionMessageParam.ofUser(
ChatCompletionUserMessageParam.builder()
.content("What's the weather in Tokyo?")
.build()
)
))
.tools(List.of(
ChatCompletionTool.builder()
.function(
FunctionDefinition.builder()
.name("get_weather")
.description("Get current weather for a city")
.parameters(Map.of(
"type", "object",
"properties", Map.of(
"city", Map.of("type", "string", "description", "City name")
),
"required", List.of("city")
))
.build()
)
.build()
))
.build()
);
ChatCompletionMessageToolCall tc = response.choices().get(0).message().toolCalls().get().get(0);
System.out.println("Function: " + tc.function().name());
System.out.println("Args: " + tc.function().arguments());
}
static void jsonMode(OpenAIClient client) {
ChatCompletion response = client.chat().completions().create(
ChatCompletionCreateParams.builder()
.model("deepseek-v4-pro")
.messages(List.of(
ChatCompletionMessageParam.ofSystem(
ChatCompletionSystemMessageParam.builder()
.content("Extract company info as JSON.")
.build()
),
ChatCompletionMessageParam.ofUser(
ChatCompletionUserMessageParam.builder()
.content("Apple Inc. is based in Cupertino, founded in 1976.")
.build()
)
))
.responseFormat(ChatCompletionResponseFormat.ofJsonObject())
.build()
);
System.out.println(response.choices().get(0).message().content().orElse(""));
}
}