Set up Java SDK

Install and initialize the LaunchDarkly Java SDK

Install the package

  <dependency>
    <groupId>com.launchdarkly</groupId>
    <artifactId>launchdarkly-java-server-sdk</artifactId>
    <version>7.0.0</version>
  </dependency>

Initialize the SDK

import com.launchdarkly.sdk.*;
import com.launchdarkly.sdk.server.*;

public class Main {
  public static void main(String[] args) {
    LDConfig config = new LDConfig.Builder().build();

    // Set your LaunchDarkly SDK key.
    // This is inlined as example only for onboarding.
    // Never hardcode your SDK key in production.
    final LDClient client = new LDClient("YOUR_SDK_KEY", config);

    if (client.isInitialized()) {
      // For onboarding purposes only we flush events as soon as
      // possible so we quickly detect your connection.
      // You don't have to do this in practice because events are automatically flushed.
      client.flush();
      System.out.println("SDK successfully initialized!");
    }
  }
}

Finding your SDK credentials

You can find your server-side SDK key, client-side ID, and mobile key in the “Resources” section of the help menu. Click the help icon at the bottom left corner of the LaunchDarkly UI, then choose SDK keys:

To learn more, read Initialize the client in the Java SDK reference guide.