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I am working on JavaFX 2.2, I am using webview to integrate html code in the JavaFX scene and was able to load the html correctly. I was following this link and was trying to pass some objects from javascript to webview/controller but I am getting null values at java side.
I have saved a interface object in JSObject like below
webEngine.getLoadWorker().stateProperty().addListener(
new ChangeListener<State>() {
@Override
public void changed(ObservableValue<? extends State> ov,
State oldState, State newState) {
if (newState == State.SUCCEEDED) {
JSObject win = (JSObject) webEngine.executeScript("window");
win.setMember("app", new JavaApp());
}
}
}
);
I have created a class
public class JavaApp {
public void exit() {
Platform.exit();
}
public void print(Date date) {
System.out.println("Parm:"+date);
}
public Date getValue() {
return new Date();
}
}
My html is
<html lang="en">
<head>
<script type="text/javascript">
function callJava(){
app.print(new Date());
var val = app.getValue();
app.print(val);
}
</script>
</head>
<body>
<p>Help</p>
<p><a href="about:blank" onclick="callJava();">Exit the Application</a></p>
</body>
</html>
In above code I always get null values printed in JavaApp.print() method. Interesting point is when I changed the parameter from Date to String in print method and pass the string from javascript, I get correct values.
How I can transfer objects in this case especially Date object. Any help is much appritiated
699
Java does not know the Date class of javascript.
2.3 Data Type Conversions
You can pass a javascript object to Java, ( you have to wrap it in a JSObject ) but you can get directly only parameters like these:
My solution for you:
public class JavaApp {
public void exit() {
Platform.exit();
}
//public void print(Date date) {
// System.out.println("Parm:"+date);
// }
public void print(long date) {
System.out.println("Parm:"+new Date(date));
}
public Date getValue() {
return new Date();
}
}
<html lang="en">
<head>
<script type="text/javascript">
function callJava(){
// app.print(new Date());
app.print(new Date().getTime());
var val = app.getValue();
app.print(val);
}
</script>
</head>
<body>
<p>Help</p>
<p><a href="about:blank" onclick="callJava();">Exit the Application</a></p>
</body>
</html>
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