Java

Conversation with Streaming Responses

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Demonstrates an AI conversation with receiving streaming responses. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkAi ai = new CkAi();

    // The provider can be "openai", "google", "claude", "deepseek", "xai", or "perplexity".
    // Support for additional providers will be added in future versions of Chilkat.
    ai.put_Provider("google");

    // Use your provider's API key.
    ai.put_ApiKey("MY_API_KEY");

    // Choose a model.
    ai.put_Model("gemini-2.5-flash");

    // Indicate streaming mode is to be used.
    ai.put_Streaming(true);

    // Create a new conversation to be maintained locally in memory.
    // If the conversation is the first to be created, it is also automatically selected.
    String systemMsg = "You are a creative storyteller";
    String developerMsg = "";
    String conversationName = "test_conversation";
    ai.NewConvo(conversationName,systemMsg,developerMsg);

    // Add a text input.
    ai.InputAddText("Write a detailed story about a turtle who decides to run a bakery.  Describe the setting, the kinds of pastries, how the turtle feels, and include at least three paragraphs.");

    // Ask the AI for text output.
    success = ai.Ask("text");
    if (success == false) {
        System.out.println(ai.lastErrorText());
        return;
        }

    CkStringBuilder sbEventName = new CkStringBuilder();
    CkStringBuilder sbDelta = new CkStringBuilder();
    CkStringBuilder sbFullResponse = new CkStringBuilder();
    boolean finished = false;
    boolean abortFlag = false;
    int maxWaitMs = 5000;

    while (!finished) {

        int result = ai.PollAi(abortFlag);
        if (result == 1) {
            // We have output waiting.  It should be instantly available.  The maxWaitMs is just-in-case.
            success = ai.NextAiEvent(maxWaitMs,sbEventName,sbDelta);
            if (success == false) {
                System.out.println(ai.lastErrorText());
                return;
                }

            // Some AI providers send many "empty" events.  Just ignore them.
            if (!sbEventName.ContentsEqual("empty",true)) {

                // The delta contains the new output.  This could be emitted to a display or the terminal
                // as real-time output.
                if (sbEventName.ContentsEqual("delta",true)) {
                    // This example will emit each delta to its own line.
                    System.out.println(sbDelta.getAsString());

                    // Accumulate the delta's so we can show the full response later.
                    sbFullResponse.AppendSb(sbDelta);
                    }
                else {
                    // A streaming AI response is always terminated by a single "null_terminator" event.
                    finished = sbEventName.ContentsEqual("null_terminator",true);
                    }

                }

            }
        else {
            if (result == 0) {
                // Nothing is immediately available. Sleep for 1/10 of a second before polling again.
                ai.SleepMs(100);
                }
            else {
                // Something failed..
                System.out.println(ai.lastErrorText());
                finished = true;
                }

            }

        }

    // -------------------------------------------------------------
    // The response is in markdown format.
    // Also see Markdown to HTML Conversion Examples.
    // -------------------------------------------------------------

    // Show the accumulated (full) response.
    System.out.println("----");
    System.out.println(sbFullResponse.getAsString());
    System.out.println("----");

    // ----------------------------------------------------------------------------------------------------------
    // For the 2nd request in this conversation, ask for a shorter version of the story.
    ai.InputAddText("Rewrite the story, but this time make it shorter, about one third as long.");
    success = ai.Ask("text");
    if (success == false) {
        System.out.println(ai.lastErrorText());
        return;
        }

    sbFullResponse.Clear();
    finished = false;

    while (!finished) {

        int result = ai.PollAi(abortFlag);
        if (result == 1) {
            // We have output waiting.  It should be instantly available.  The maxWaitMs is just-in-case.
            success = ai.NextAiEvent(maxWaitMs,sbEventName,sbDelta);
            if (success == false) {
                System.out.println(ai.lastErrorText());
                return;
                }

            // Some AI providers send many "empty" events.  Just ignore them.
            if (!sbEventName.ContentsEqual("empty",true)) {

                // The delta contains the new output.  This could be emitted to a display or the terminal
                // as real-time output.
                if (sbEventName.ContentsEqual("delta",true)) {
                    // This example will emit each delta to its own line.
                    System.out.println(sbDelta.getAsString());

                    // Accumulate the delta's so we can show the full response later.
                    sbFullResponse.AppendSb(sbDelta);
                    }
                else {
                    // A streaming AI response is always terminated by a single "null_terminator" event.
                    finished = sbEventName.ContentsEqual("null_terminator",true);
                    }

                }

            }
        else {
            if (result == 0) {
                // Nothing is immediately available. Sleep for 1/10 of a second before polling again.
                ai.SleepMs(100);
                }
            else {
                // Something failed..
                System.out.println(ai.lastErrorText());
                finished = true;
                }

            }

        }

    System.out.println("----");
    System.out.println(sbFullResponse.getAsString());
  }
}