try {
            aSocketServer = new ASocketServer(443);
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
        
        try {
            SSLContext sslContext = getSslContext();
            if (sslContext != null) {
                aSocketServer.setWebSocketFactory(new DefaultSSLWebSocketServerFactory(sslContext));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

public static SSLContext getSslContext() {
        try {
            final char[] pass = "pass".toCharArray();
            final KeyStore keyStore = KeyStore.getInstance("JKS");
            
            try (final InputStream is = new FileInputStream("file.jks")) {
                keyStore.load(is, pass);
            }
            
            final KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
            kmf.init(keyStore, pass);
            final TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
            tmf.init(keyStore);
            final SSLContext sc = SSLContext.getInstance("TLS");
            sc.init(kmf.getKeyManagers(), tmf.getTrustManagers(), new java.security.SecureRandom());
            return sc;               
            
        } catch (KeyStoreException | KeyManagementException | UnrecoverableKeyException | NoSuchAlgorithmException | CertificateException | IOException exc) {
		throw new RuntimeException(exc);
	}
    }

import java.net.InetSocketAddress;
import java.net.UnknownHostException;

import org.java_websocket.WebSocket;
import org.java_websocket.framing.Framedata;
import org.java_websocket.handshake.ClientHandshake;
import org.java_websocket.server.WebSocketServer;

import java.util.Date;


public class AsSocketServer extends WebSocketServer {
    
    public ASocketServer( int port ) throws UnknownHostException {
        super( new InetSocketAddress( port ) );
    }

    public ASocketServer( InetSocketAddress address ) {
        super( address );
    }

    @Override
    public void onOpen( WebSocket conn, ClientHandshake handshake ) {
    }
}