fix: Use LAUNCHDARKLY_SDK_KEY instead

Author: louis-launchdarkly

README.md

@@ -8,10 +8,10 @@ Below, you'll find the basic build procedure, but for more comprehensive instruc
 
 This project uses [Gradle](https://gradle.org/). It requires that Java is already installed on your system (version 8 or higher). It will automatically use the latest release of the LaunchDarkly SDK with major version 7.
 
-1. Set the value of environment variable `LAUNCHDARKLY_SERVER_KEY` to your LaunchDarkly SDK key. If there is an existing boolean feature flag in your LaunchDarkly project that you want to evaluate, edit `src/main/java/Hello.java` and set `FEATURE_FLAG_KEY` in code to the flag key.
+1. Set the value of environment variable `LAUNCHDARKLY_SDK_KEY` to your LaunchDarkly SDK key. If there is an existing boolean feature flag in your LaunchDarkly project that you want to evaluate, edit `src/main/java/Hello.java` and set `FEATURE_FLAG_KEY` in code to the flag key.
 
 ```sh
-  export LAUNCHDARKLY_SERVER_KEY=1234567890abcdef
+  export LAUNCHDARKLY_SDK_KEY=1234567890abcdef
 ```
 
 ```java

src/main/java/Hello.java

@@ -29,12 +29,9 @@ private static void showBanner() {
   }
 
   public static void main(String... args) throws Exception {
-    // Set this environment variable to skip the loop process and evaluate the flag
-    // a single time.
     boolean CIMode = System.getenv("CI") != null;
 
-    // Get SDK Key from env variable LAUNCHDARKLY_SERVER_KEY
-    String envSDKKey = System.getenv("LAUNCHDARKLY_SERVER_KEY");
+    String envSDKKey = System.getenv("LAUNCHDARKLY_SDK_KEY");
     if(envSDKKey != null) {
       SDK_KEY = envSDKKey;
     }
@@ -47,7 +44,7 @@ public static void main(String... args) throws Exception {
     LDConfig config = new LDConfig.Builder().build();
 
     if (SDK_KEY == null || SDK_KEY.equals("")) {
-      showMessage("Please set the LAUNCHDARKLY_SERVER_KEY environment variable or edit Hello.java to set SDK_KEY to your LaunchDarkly SDK key first.");
+      showMessage("Please set the LAUNCHDARKLY_SDK_KEY environment variable or edit Hello.java to set SDK_KEY to your LaunchDarkly SDK key first.");
       System.exit(1);
     }