final Stage stage;
webEngine.getLoadWorker().stateProperty().addListener(
        new ChangeListener() {
            public void changed(ObservableValue ov, State oldState, State newState) {
                if (newState == Worker.State.SUCCEEDED) {
                    stage.setTitle(webEngine.getLocation());
                }
            }
        });
webEngine.load("http://javafx.com");
 

Caused by: java.lang.RuntimeException: Uncompilable source code - <anonymous webview.WebViewLoad$1> is not abstract and does not override abstract method changed(javafx.beans.value.ObservableValue,java.lang.Object,java.lang.Object) in javafx.beans.value.ChangeListener


should be new ChangeListener<State>() {