WSS from JavaScript to plain Java

Question

I am trying to create a websocket connection from JavaScript code to a Java server. I have managed to do this with a unsecure ws connection, but because the website that I want to use this code on is a secure https side, I have to use a secure websocket.

I have spend quite some time on research trying to get this to work, however I can't figure out how to get them connected. I have absolutely no experience with stuff like keystores or ciphers, but I don't need that security, I don't want to send any sensitive data.

Anyways, here is what I've tried:

SLLServerSocket server = (SSLServerSocket) SSLServerSocketFactory
        .getDefault().createServerSocket(1234);
SSLSocket client = (SSLSocket) server.accept();

with corresponding JavaScript code:

var socket = new WebSocket("wss://localhost:1234")
socket.onopen = () => console.log("Connected");
socket.onmessage = m => console.log("Message received:", m);

Running this resulted in a Caused by: javax.net.ssl.SSLHandshakeException: No available authentication scheme which I managed to fix by adding

System.setProperty("jdk.tls.server.protocols", "TLSv1.2");

Now I am getting the exception javax.net.ssl.SSLHandshakeException: no cipher suites in common. I've done some research on that as well but whatever I find seems assume that a keystore or something is already there, which it is not for me. In fact I don't really know what encryption it should use, I did not find anything about that

To be fair, part of the problem may very well be that I don't know what to actually search for, but that is why I am asking. There are already articles about these exceptions I am showing, I know them, and they didn't help.