For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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  • Get started
    • Overview
    • Onboarding
      • Set up .NET (server-side) SDK
      • Set up Android SDK
      • Set up Go SDK
      • Set up iOS SDK
      • Set up Java SDK (server-side)
      • Set up JavaScript SDK
      • Set up Node.js (client-side) SDK
      • Set up Node.js (server-side) SDK
      • Set up Python SDK
      • Set up React Native SDK
      • Set up React Web SDK
      • Set up Vue SDK
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On this page
  • Install the package
  • Initialize the SDK
Get startedOnboarding

Set up Java SDK

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Set up JavaScript SDK

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Install the package

1<dependency>
2 <groupId>com.launchdarkly</groupId>
3 <artifactId>launchdarkly-java-server-sdk</artifactId>
4 <version>7.0.0</version>
5</dependency>

Initialize the SDK

Java SDK initialization
1import com.launchdarkly.sdk.*;
2import com.launchdarkly.sdk.server.*;
3
4public class Main {
5 public static void main(String[] args) {
6 LDConfig config = new LDConfig.Builder().build();
7
8 // This is your LaunchDarkly SDK key.
9 // Never hardcode your SDK key in production.
10 final LDClient client = new LDClient("YOUR_SDK_KEY", config);
11
12 if (client.isInitialized()) {
13 // For onboarding purposes only we flush events as soon as
14 // possible so we quickly detect your connection.
15 // You don't have to do this in practice because events are automatically flushed.
16 client.flush();
17 System.out.println("SDK successfully initialized!");
18 }
19 }
20}
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.