CODEWITHSUNDEEP
javajavascripteventsapplet
ken
ken

Reputation: 5086

Passing JS function to applet for as event listener

Is it possible to pass a function/callback from javascript to a java applet?

For example i have an applet with a button that when pressed it will call the passed js callback

function onCommand() {
  alert('Button pressed from applet');
}
applet.onCommand(onCommand);

Upvotes: 4

Views: 2924

Answers (3)

Tom
Tom

Reputation: 6697

ps. to use JSObject you may need to include "MAYSCRIPT" tag to applet html tag.

Upvotes: 3

tim_yates
tim_yates

Reputation: 171114

I tend to use something I derived from the reflection example at the bottom of this page, as then you don't need to meddle with your classpath to get it to compile

Then I just pass JSON strings around between the applet and javascript

Upvotes: 4

moonshadow
moonshadow

Reputation: 89085

You can use JSObject to call back into javascript from Java.

From that page:

import netscape.javascript.*;
import java.applet.*;
import java.awt.*;
class MyApplet extends Applet {
     public void init() {
         JSObject win = JSObject.getWindow(this);
         JSObject doc = (JSObject) win.getMember("document");
         JSObject loc = (JSObject) doc.getMember("location");

         String s = (String) loc.getMember("href");  // document.location.href
         win.call("f", null);                      // Call f() in HTML page
     }
}

Upvotes: 3

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