Set up Java (server-side) SDK - LaunchDarkly

Install and initialize the LaunchDarkly Java SDK to start evaluating feature flags in your application.

Install the package

<dependency>
  <groupId>com.launchdarkly</groupId>
  <artifactId>launchdarkly-java-server-sdk</artifactId>
  <version>7.15.0</version>
</dependency>

implementation group: 'com.launchdarkly', name: 'launchdarkly-java-server-sdk', version: '7.15.0'

Initialize the SDK

Java SDK initialization

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

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

    // This is your LaunchDarkly SDK key.
    // 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 keys, mobile keys, and client-side ID on the SDK keys page under Settings.

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