TLS extension "Server Name Indication" (SNI): value not available on server side

Based on the JSSE examples, I'm trying to get the value of the TLS parameter "Server Name Indication" (SNI) on the server side - without success. I'm sure that the value is sent by the client since I used a network sniffer (Wireshark) that shows the value.

But when I use the following code fragment, the list of server name parameters is empty (while the "protocols" are shown):

public void connectionAccepted(Socket socket) 
{ 
  System.out.println("Connection accepted!"); 
  try { 
    /* get SNI parameter */ 
    SSLSocket sslSocket = (SSLSocket)socket; 
    SSLParameters sslParams = sslSocket.getSSLParameters(); 

    List<SNIServerName> serverNames = sslParams.getServerNames(); 
    for(SNIServerName item : serverNames){ 
      System.out.println("SNI: " + item.toString()); 
    } 

    String[] protocols = sslParams.getProtocols(); 
    for(String item : protocols) { 
      System.out.println("Protocols: " + item.toString()); 
    } 
  } catch (Exception e) { 
    e.printStackTrace(); 
  } 
}