从 Java 调用 JavaScript 时出错

我试图从 Java 调用 JavaFx WebView 中的 JavaScript，但我得到：

Exception in thread "JavaFX Application Thread" netscape.javascript.JSException: TypeError: undefined is not a function
at com.sun.webkit.dom.JSObject.fwkMakeException(JSObject.java:128)
at com.sun.webkit.WebPage.twkExecuteScript(Native Method)
at com.sun.webkit.WebPage.executeScript(WebPage.java:1439)
at javafx.scene.web.WebEngine.executeScript(WebEngine.java:982)
  

.java 文件

private WebView emailSubject() {
    String pageURL = "D:myproject\\src\\resources\\WEB_INF\\forms\\readMail\\emailBody.html";
    pageURL = pageURL.replace("\\", "/");
    webView = new WebView();
    webView.setMaxHeight(52);

    webEngine = webView.getEngine();
    emailSubject = getHTMLMailSubject();

    webEngine.getLoadWorker().stateProperty().addListener((ov, oldState, newState) -> {
        if (newState == State.SUCCEEDED) {
            webEngine.executeScript("testCheckMate(\"" + emailSubject + "\");");
        }
    });

    webEngine.load("file:" + pageURL);
    return webView;
}

指向这一行的异常：

webEngine.executeScript("testCheckMate(\"" + emailSubject + "\");");

HTML：

<!-- Latest compiled and minified JavaScript -->
<script src="../../baseJS/JQuery/jquery-1.11.3.js"></script>
<script src="../../baseJS/JQuery/jquery.min.js"></script>

<div class="panel panel-success">
    <div class="panel-heading">
        <h3 class="panel-title">Home Alone</h3>
    </div>
</div>

<script>
    $(document).ready(function() {
        window.testCheckMate = function (data) {
            $(".panel-title" ).append(data);
        };
    });     
</script>

我究竟做错了什么？谢谢大家。

请注意，我已经尝试过：

load();已经

$(".panel-title" ).load(data);

以及与

testCheckMate外部$(document).ready(function()，但还是一无所获。

testCheckMate = function (data) {
    $(".panel-title" ).load(data);
};