Enable Proxy for all connections

proxy.java

private void enableProxy() {
    System.setProperty("http.proxySet", "true");
    System.setProperty("http.proxy", "localhost"); // JavaFX WebView
    System.setProperty("http.proxyHost", "localhost");
    System.setProperty("http.proxyPort", "8080");

    System.setProperty("https.proxySet", "true");
    System.setProperty("https.proxy", "localhost"); // JavaFX WebView
    System.setProperty("https.proxyHost", "localhost");
    System.setProperty("https.proxyPort", "8080");
}