Java Security

I'm trying to implement an SSL connection with a custom protocol above it, not HTTPS. I don't want to use certs because I don't want the users to have to deal with them. So I created essentially a dummy cert on the server, and I'd like to find a way to tell the client not to validate the cert.

I found the following code from the Java Developer's Almanac, which shows how to do this for an HTTPS connection. Is there a way to do this for any SSL/TLS connection that doesn't use HTTPS? Or do I need to have all the users install a cert in the client's trust store?

// Create a trust manager that does not validate certificate chains
    TrustManager[] trustAllCerts = new TrustManager[]{
        new X509TrustManager() {
            public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                return null;
            }
            public void checkClientTrusted(
                java.security.cert.X509Certificate[] certs, String authType) {
            }
            public void checkServerTrusted(
                java.security.cert.X509Certificate[] certs, String authType) {
            }
        }
    };
    
    // Install the all-trusting trust manager
    try {
        SSLContext sc = SSLContext.getInstance("SSL");
        sc.init(null, trustAllCerts, new java.security.SecureRandom());
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
    } catch (Exception e) {
    }
    
    // Now you can access an https URL without having the certificate in the truststore
    try {
        URL url = new URL("https://hostname/index.html");
    } catch (MalformedURLException e) {
    }