This function will get the secret value by a key.

// Get a secret by secret key
Secret secret = client.secrets().retrieve("java_key_1", Secret.class);
String secretValue = client.secrets().retrieve("java_key_1", String.class);

You could get a secret value by a secret key and specific environment name

// Get a secret by secret key and specific environment name
Secret secret = client.secrets().retrieve("java_key_1", Secret.class, "env_name");
String secret = client.secrets().retrieve("java_key_1", String.class, "env_name");