Javascript to Java Applet communication

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I am trying to pass a selected value from HTML drop-down to an Applet method, using setter method in the Applet. But every time the Javascript is invoked it shows \"object d

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情深已故

2020-12-06 03:55
Try changing the id parameter in your applet tag to name instead.
```
<applet name="decisiontreeapplet" ...>
</applet>
```
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迷失自我

2020-12-06 03:56

Try passing parameters using the param tag:

http://download.oracle.com/javase/tutorial/deployment/applet/param.html

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遇见更好的自我

2020-12-06 04:03

Change..

document.decisiontreeapplet

..to..

document.getElementById('decisiontreeapplet')

..and it will most likely work.

E.G.

HTML

<html>
<body>
<script type='text/javascript'>
function callApplet() {
    msg = document.getElementById('input').value;
    applet = document.getElementById('output');
    applet.setMessage(msg);
}
</script>
<input id='input' type='text' size=20 onchange='callApplet()'>
<br>
<applet
    id='output'
    code='CallApplet'
    width=120
    height=20>
</applet>
</body>
</html>

Java

import javax.swing.*;

public class CallApplet extends JApplet {

    JTextField output;

    public void init() {
        output = new JTextField(20);
        add(output);
        validate();
    }

    public void setMessage(String message) {
        output.setText(message);
    }
}

Please also consider posting a short complete example next time. Note that the number of lines in the two sources shown above, is shorter that your e.g. applet, and it took me longer to prepare the source so I could check my answer.

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生来不讨喜

2020-12-06 04:12

I think the <applet> tag is obsolete and <object> tag shoudl be used instead. I recall there was some boolean param named scriptable in the object tag.

Why you do not use deployment toolkit ? It would save you a lot of trying - see http://rostislav-matl.blogspot.com/2011/10/java-applets-building-with-maven.html for more info.

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