Java Sample Code

ld.java

import com.launchdarkly.client.*;

LDClient ldClient = new LDClient("YOUR_SDK_KEY");

LDUser user = new LDUser.Builder("some_id")

    // // 100% Optional 
    .firstName("Ernestina")
    .lastName("Evans")
    .email("[email protected]")

    // Any arbitrary custom metadata can be passed along
    .custom("groups", Arrays.asList("VIP")
    .custom("country", Arrays.asList("UK"))
    .custom("plan", Arrays.asList("silver"))
    .custom("MRR", 500)
    .custom("SignUpDate", "1/1/2017")
    .custom("version", 11)
    .build()

boolean showFeature = ldClient.boolVariation(
    "beta-ui", 
    user, 
    false
    );

if (showFeature) {
    // application code to show the feature 
    newCode()
}
else {
    oldCode()
    // the code to run if the featnew-checkout-flowure is off
}