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Error when calling javascript method from applet

Answer 1

+1 A:

I did a quick test and my findings correlate well with musicfreak's comment.

With the following Applet:

public class MyClass extends JApplet {
    public void init() {
        JSObject window = JSObject.getWindow(this); 
        Object[] args = new String[] { "bar" }; 
        window.call("foo", args); 
    }
}

and the following markup (notice the erroneous JavaScript - there's no baz method in the bar argument I'm passing):

<html>
  <head>
    <title>MyAppletTest</title>
  </head>
  <body>
    <script type="text/javascript">
      function foo(bar) { bar.baz(); }
    </script>
    <applet code="MyApplet.class"></applet>
  </body>
</html>

I get the error:

netscape.javascript.JSException: JavaScript error while calling "foo"
    at sun.plugin2.main.client.MessagePassingJSObject.newJSException(Unknown Source)
    at sun.plugin2.main.client.MessagePassingJSObject.waitForReply(Unknown Source)
    at sun.plugin2.main.client.MessagePassingJSObject.call(Unknown Source)
    at MyApplet.init(MyApplet.java:13)

If I fix my JavaScript function by replacing bar.baz() with alert(bar) for example, everything works fine.

Long story short - take another look at the JavaScript function you are trying to call, as well as the parameters your Applet passes with the call.

Lauri Lehtinen 2010-06-17 23:39:35

Hi Lauri, thanks for your help. I'll check it again to see if anything wrong with the js.

Khue Vu 2010-06-18 12:29:39

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Error when calling javascript method from applet

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