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Java Applet removing all content from HTML page

I have the following Java Applet, which makes a simple sound:
import java.applet.*;
import java.awt.Graphics;
import java.net.MalformedURLException;
import java.net.URL;
public class Sound extends Applet {
AudioClip soundFile1;
public void init() {
soundFile1 = getAudioClip(getDocumentBase(),"collectgarments_alreadyassigned.wav");
soundFile1.play();
}
}
I want to use this applet in an HTML page, which is inside a .net project. I want it to be deployed eg make its sound onClick, so am trying to create a JavaScript method to play the sound.
So far I have the following:
function Sound() {
var attributes = { id:'SoundApplet', code:'Sound.class', archive:'Java/Sound.jar', width:0, height:0} ;
var parameters = { permissions:'sandbox'} ;
deployJava.runApplet(attributes, parameters, '1.6');
}
This method makes the sound, but it also makes all the HTML disappear on the screen.
Possible reasons for this I can think of are that the Applet is trying to rewrite all the HTML on the page but is not being given any HTML to write?
If so a possible solution could be to include it in a div in a similar way to a div set to `display="none"', but I would not know how to do that as this is a sound not a visual aspect.
Maybe my thoughts are completely wrong and it is something else altogether.
I cannot find anything relevant on the internet and the internet explorer debugger is no help either.
Anyone else come across this problem??

I have found the answer myself. I do not know the reasons that this works, but it does:
function Sound()
{
var app = document.createElement('applet');
app.id= 'SoundApplet';
app.archive= 'Java/Sound.jar';
app.code= 'Sound.class';
app.width = '0';
app.height = '0';
document.getElementsByTagName('body')[0].appendChild(app);
}

How to create iframe JAVASCRIPT to JAVA in GWT?

Can anyone help me to javascript into java in gwt, and I need one simple example for this and I am gonna one JavaScript(URL) user form in to Java.
Thanking you

Try with Frame to create iframe in JAVA in GWT.
public class FrameExample implements EntryPoint {
public void onModuleLoad() {
// Make a new frame, and point it at Google.
Frame frame = new Frame("http://www.google.com/");
// Add it to the root panel.
RootPanel.get().add(frame);
}
}
Find more than 30 Code Examples here Java Code Examples for Frame

Get page's html source using a Java applet

I know in scripting languages like Python that this is possible but I know that Java applets can't access other servers other than their own.
I don't know/think I can get this applet signed. Is there a way to use PHP to do what I want to accomplish?
I also know that this code will go to google.com
import java.applet.*;
import java.awt.*;
import java.net.*;
import java.awt.event.*;
public class tesURL extends Applet implements ActionListener{
public void init(){
String link_Text = "google";
Button b = new Button(link_Text);
b.addActionListener(this);
add(b);
}
public void actionPerformed(ActionEvent ae){
//get the button label
Button source = (Button)ae.getSource();
String link = "http://www."+source.getLabel()+".com";
try
{
AppletContext a = getAppletContext();
URL u = new URL(link);
// a.showDocument(u,"_blank");
// _blank to open page in new window
a.showDocument(u,"_self");
}
catch (MalformedURLException e){
System.out.println(e.getMessage());
}
}
}
That is assuming that source.getLabel() is "google"
But how would I get the source html of that page?
The source html is dynamic and is updated every few seconds or miliseconds. But, the html is also updated, so I can still read the dynamic content directly from the html. I already did this in vb.net, but now I need to port it to Java, but I can't figure out how to access a page's html source; that's why I'm asking.

AppletContext.showDocument opens a page in the browser, much like a hyperlink in HTML or a similar call in JavaScript would do. Under the Same Origin Policy you will not have access to this page if it is from a different site, even if the page is in an iframe.
Some sites may have a crossdomain.xml policy file that allows access if you were to read the contents of the java.net.URL directly. However, www.google.com appears to be using a restricted form that I don't believe is currently supported by the Java PlugIn.
Someone will probably suggest signing your applet, which turns off the "sandbox" security feature of Java. You would then need to persuade your users to trust your ability to publish safe signed code.

Bridge between the Java applet and the text input controls on the web page

I have been working with a Java applet which is an applet that helps to write using only a mouse. For my case, I am trying to incorporate this into my webiste project as follows:
When the user clicks on any input element (textbox/textarea) on the page, this JAVA applet loads on the webpage itself. In the screenshot of the JAVA applet seen below, the user points to an alphabet to and the corresponding text gets written in the text box of the applet.
Now what I am trying to do is to get this text from the TextBox of the applet to the input element on the webpage. I know that this needs an interaction between the Java and JavaScript, but not being a pro, I really do not have the catch. Here's the Java applet and the code I have written.
Java applet and jQuery code (298kB): http://bit.ly/jItN9m
Please could somebdoy help for extending this code.
Thanks a lot!
Update
I searched somewhere and found this -> To get the text inside of Java text box, a getter method in the Applet to retrieve the text:
public class MyApplet extends JApplet {
// ...
public String getTextBoxText() { return myTextBox.getText(); }
}
In the JQuery code, the following lines are to be added I think:
var textBoxText = $("#applet-id")[0].getTextBoxText();
//Now do something with the text
For the code of the applet, I saw a GNOME git page here. The getText call already exists -- look at the bottom of this file: http://git.gnome.org/browse/dasher/tree/java/dasher/applet/JDasherApplet.java
I'd need to call 'getCurrentEditBoxText' but when should this method 'getCurrentEditBoxText' be called?
In my case, I would probably have to do it when the user clicks in a new input control etc.

You can have full communication between your Applet and any javascript method on the page. Kyle has a good post demonstrating how the Javascript can call the applet and request the text value. However, I presume you want the HTML Textfield to update with each mouse click, meaning the applet needs to communicate with the page. I would modify your javascript to something like this:
var activeTextArea = null;
$('textarea, input').click(function() {
$(this).dasher();
activeTextArea = this;
});
function updateText(text) {
// Careful: I think textarea and input have different
// methods for setting the value. Check the
// jQuery documentation
$(activeTextArea).val(text);
}
Assuming you have the source for the applet, you can have it communicate with the above javascript function. Add this import:
import netscape.javascript.JSObject;
And then, in whatever onClick handler you have for the mouse clicks, add:
// After the Applet Text has been updated
JSObject win = null;
try {
win = (JSObject) JSObject.getWindow(Applet.this);
win.call("updateText", new Object[] { textBox.getText() });
} catch (Exception ex) {
// oops
}
That will update the text each time that chunk of code is called. If you do NOT have access to the applet source, things get trickier. You'd need to set some manner of javascript timeout that constantly reads the value from the applet, but this assumes the applet has such a method that returns the value of the textbox.
See Also: http://java.sun.com/products/plugin/1.3/docs/jsobject.html
Update Modifying the applet is your best shot since that is where any event would be triggered. For example, if you want the HTML TextField to change on every click, the click happens in the applet which would need to be modified to trigger the update, as described above. Without modifying the applet, I see two options. Option #1 uses a timer:
var timer;
var activeTextArea;
$('textarea, input').click(function() {
$(this).dasher();
activeTextArea = this;
updateText();
}
function updateText() {
// Same warnings about textarea vs. input
$(activeTextArea).val($('#appletId')[0].getCurrentEditBoxText());
timer = setTimeout("updateText()", 50);
}
function stopUpdating() {
clearTimeout(timer);
}
This is similar to the code above except clicking on a text area triggers the looping function updateText() which will set the value of the HTML text field to the value of the Applet text field every 50ms. This will potentially introduce a minor delay between click and update, but it'll be small. You can increase the timer frequency, but that will add a performance drain. I don't see where you've 'hidden' the applet, but that same function should call stopUpdating so that we are no longer trying to contact a hidden applet.
Option #2 (not coded)
I would be to try and capture the click in the Applet as it bubbles through the HTML Dom. Then, you could skip the timer and put a click() behavior on the Applet container to do the same update. I'm not sure if such events bubble, though, so not sure if this would work. Even if it did, I'm not sure how compatible it would be across browsers.
Option #3
Third option is to not update the HTML text field on every click. This would simply be a combination of Kyle's and my posts above to set the value of the text field whenever you 'finish' with the applet.

Here's a possible solution. To get the text inside of your Java text box, write a getter method in the Applet to retrieve the text:
public class MyApplet extends JApplet {
// ...
public String getTextBoxText() { return myTextBox.getText(); }
}
In your JQuery code, add the following lines:
var textBoxText = $("#applet-id")[0].getTextBoxText();
//Now do something with the text
I found most of what I posted above here. Hope this helps.

This page explains how to manipulate DOM from a Java applet. To find the input element, simply call the document.getElementById(id) function with id of an id attribute of the text input box.

jQuery and Java applets

I'm working on a project where we're using a Java applet for part of the UI (a map, specifically), but building the rest of the UI around the applet in HTML/JavaScript, communicating with the applet through LiveConnect/NPAPI. A little bizarre, I know, but let's presume that setup is not under discussion. I started out planning on using jQuery as my JavaScript framework, but I've run into two issues.
Issue the first:
Selecting the applet doesn't provide access to the applet's methods.
Java:
public class MyApplet extends JApplet {
// ...
public String foo() { return "foo!"; }
}
JavaScript:
var applet = $("#applet-id");
alert(applet.foo());
Running the above JavaScript results in
$("#applet-id").foo is not a function
This is in contrast to Prototype, where the analogous code does work:
var applet = $("applet-id");
alert(applet.foo());
So...where'd the applet methods go?
Issue the second:
There's a known problem with jQuery and applets in Firefox 2: http://www.pengoworks.com/workshop/jquery/bug_applet/jquery_applet_bug.htm
It's a long shot, but does anybody know of a workaround? I suspect this problem isn't fixable, which will mean switching to Prototype.
Thanks for the help!

For the first issue, how about trying
alert( $("#applet-id")[0].foo() );
For the second issue here is a thread with a possible workaround.
Quoting the workaround
// Prevent memory leaks in IE
// And prevent errors on refresh with events like mouseover in other browsers
// Window isn't included so as not to unbind existing unload events
jQuery(window).bind("unload",
function() {
jQuery("*").add(document).unbind();
});
change that code to:
// Window isn't included so as not to unbind existing unload events
jQuery(window).bind("unload",
function() {
jQuery("*:not('applet, object')").add(document).unbind();
});