Passing Arrays To Java From JavaScript
Jul 20, 2006
This may be more of a Java question, but I feel that JavaScript experts
may be more qualified to help me find a solution.
In short: is it possible to call a Java method from JavaScript, passing
as an argument a JavaScript array (in my case, an array of doubles)?
Supposing I have array x containing only doubles, I have tried:
document.MyApplet.myMethod(x);
But the method only ever seems to receive "null" as an argument.
Conversely, if I try this with a String, or a single character, or
almost anything else, there isn't a problem. Any ideas?
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Nov 14, 2000
I've been working on trying to compile this bit of Java code. It's taken from an existing code (with permission) that I know works. The problems started when I added an array. Code:
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Jul 12, 2000
How will define an array in Java script How do I use this to pass values to servlets
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Aug 9, 2011
I have some input fields of type text. I have two arrays, one containing values and second containing the value of "name" attributes. Now I want to use them in my php script on the SAME PAGE.
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Feb 17, 2006
I am working on a simple Expanding Family Tree.
There are two principal Objects: Person and Family,
and two subsidiary ones: Sibling-sets and multi-Marriage-sets.
When I click on a Family Button, I want to display all the Persons
of a Sibling-set.
Married Siblings will have a Button. Pressing this should display
one or more Marriage-Partners. If these Marriages (Families)
have children, they will have a Family-Button.
You will notice the code for the four objects is fairly repetitious,
but that for the variable-length Sibling and Marriage Arrays,
is what has kept me struggling for days.
Lines S04-S10 and M04-M10 appear to be the problems.
Even though I think addSibling() is constructing Sibling objects,
S06 reads the Argument vector as a single item
S07 tells me the argument-count is 1.
so S09 processes only once, and then..
it interprets argv[s] as a single item,
but assigns the whole array to this.sibA.
Can anyone tell me what I am doing wrong? Code:
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Apr 7, 2010
However, there is one problem that I just can not figure out. I have 3 arrays storing information on page1.htm, this is all well and good, but I want to use the data stored in those 3 arrays when the user moves to page2.htm.
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Nov 8, 2010
I was having some trouble with 2D arrays (or array of arrays). Essentially, the array has 100 rows, with two columns. The first column of every row holds a name, and the second holds a sales amount. With the use of a do while loop, the user can continuously add up to 100 names and sales amounts. After all the information the user wishes to add is stored into the 2D array I'm attempting to pass that very same 2D array as a parameter to a function called printRow as can be seen in the code below: Note: the function call and the actual function are found in two separate javascripts.
[Code]...
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Jul 23, 2005
Can Java classes/objects be used from within the javascript code on the
HTML page? I.e., can I call a Java method from the javascript function?
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Jul 23, 2005
in JSP, it's easy to pass value from java-variable to
javascript-variable, like
js_function(a)
{ a=<%java-class.A%>
}
I'm wondering how is the other way around? I tried
js_function(a)
{ <%java-class.A=%>a
}
but there was compiling error.
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Apr 19, 2001
Is DHTML a language? or is it a composition of JavaScript and css? Does Java(not javascript) has something to do in it?
What is actually the best to create client-side dynamic pages?
I know JAVA is used to create applets but I am not sure of wich is the most powerful....
Also, wich are the newer versions of all the above languages?
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Jan 19, 2007
I am a XHTML/CSS developer with an interest in AJAX. I am at the stage were I wish to learn how it's all done.
So my quesiton is this:
To develop AJAX applications do I need to learn JAVA or Javascript?
It may sound like a dumb question considering AJAX is mainly javascript and XML, however will learning JAVA first off be a benefit?
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Jun 5, 2006
I am trying to call a java method from within my Javascript, but cannot
seem to get it to work. All the examples I have found online and in
the forums are using Java applets. I have a method that I want to call
that does a search, and produces a message dialog displaying the
results. Also, the class file lives next to the html file. How would
I invoke this in my code? This is what I have now:
<script>
function searchStrings(){
Searcher.search();
}
</script>
<form>
<input type="button" value="Search" onclick=searchStrings()>
</form>
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Jul 20, 2005
let's me explains my long problem:
I'm doing an intranet with a media part. So im must be able to upload files on
a ftp server AND have a record of informations about this file and meta date in
a MySQL database, shown in a php page.
So the first thing i was doing was:
1/ * A HTML Form, with a <input type="file"> which was uploading the file to
the web server. And then, in the next action-php-page, using ftp functions from
php to upload to the ftp server. But this make upload the file 2 times, which
slow, and the user can't do anythig except waiting in front of a blanck loading
page.
=> no way
(BTW, the site admin refuse that the ftp server and the web server to be the
same computer)
So i tried something else:
2/ * A HTML form, the user enter meta data about the media, click next, and
then, a php page which loads a java applet an pass informations to it (by param
tags).
The applet have a browse button, and a go button, which start the transfert
(JDK 1.4.1) trough the URLConnection. The file is uploaded once, and there is a
progress bar, which is wonderful.
But now, i need the src_file information wich is the java applet. So i have two
options:
A/ I make a post to the webserver from the applet. But i'm using session
identification (needed for tracing users actions) and i'm gonna use SSL in less
than one month, so i think it would be complicated.
B/ I export the information from the java applet to javascript, and then to
HTML hidden field, so that the user can submit the full-hidden-filled form. But
i can't make LiveConnect works.
i'm under Mac OS X 10.2 (jaguar) so i need to make work LiveConnect on both
Safari 1.0 (v85.6), mozilla 1.5, and Mac OS IE (5.2).
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Aug 23, 2006
Can you call a java class from within a javascript?
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Jun 5, 2007
Why wont this work? checkFields() iF statment is failing. The select must be set to multiple.
<form method="POST" action="" name="this_form" onSubmit="return checkFields();">
<select name="this_select[]" multiple>
<option value="ts1">ts1</option>
<option value="ts2">ts2</option>
<option value="ts3">ts3</option>
<option value="ts4">ts4</option>
</select>
</form>
<script language="Javascript">
<!--
function checkFields(){
var errormsg = "";
if (document.this_form.this_select.value == "") { var errormsg = errormsg + "Please Select an Value.
"; }
if (errormsg != "") { alert(errormsg); return false; }
}
//-->
</script>
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Jul 23, 2005
A Java applet has two methods stop() and destroy() that get called when the user moves to a different page. Does javascript have anything similar?
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Jul 23, 2005
I am writing a java application as a mozilla extension.
Because mozilla uses javascript for the frontend,
i need the javascript to call my external java application
and pass one parameter to it.
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Aug 23, 2006
Can anyone help me how to set default website as homepage in mozilla using java/ javascript.
Following javascripts code works in IE but not in Mozilla.
<input type="button" value="Set Default" onClick="this.style.behavior='url(#default#homepage)'
this.setHomePage('http://www.myDefaultWebsite.com')">
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Jan 20, 2006
How do I take <%=Keyword%> in Javascript and break it down to arrays?
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Jan 9, 2007
I know very little javascript and need to use it to pt a banner across a page, where it is pulling from values a customer puts in the backend.Here is the javascript: Code:
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Jun 24, 2002
I am looking at a client’s site that has a scrolling text bar at the bottom of the page for latest news. I have been asked to recommend whether they keep the scrolling text as a java applet or whether they make it dhtml with Javascript to make it scroll.
To be honest, I’m not sure whether there really is an important difference, in terms of download time, likelihood of working (if client browsers are better enabled for one verses the other), or whether there are any other reasons one should be used over the other.
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Apr 13, 2007
I'm having an array dynamically fetched from the database using php, in result, I'm getting a check box, with their corresponding value.
I wanted to make a javascript function so that if I uncheck a checkbox, corresponding value disappears.
Before going to the looping, I was trying to do a simple check - like this -
function checkOtherValues() {
if (document.myform.checkmember[0].checked==false) {
document.myform.checkvalue[0].value="";
}
}
I thought this should work, but I'm getting the following error -
document.myform.checkmember.0 is null or not an object For the form, it's set in this way -
<input type="checkbox" name="checkmember[]" value="<?=$chmember[$i]?>" onClick="return checkOtherValues()">
<input type="text" name="checkvalue[]" size="5" value="<?=$chvalue[$i]?>" />
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Jul 23, 2005
I need to pass a javascript to JSP code but I cannot figure it out.
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Jul 23, 2005
I have a JavaScript function that receives an Array with words. This
Array can be gotten from a query to a DB using JSP.
The JavaScript function is executed when onFocus event occurs:
<input type='text' onFocus='myFunction(this.event, myArray);' />
myArray is declared as:
<script>
var myArray = new Array('j'habite', 'tu habites', 'il habite');
</script>
I want to tell javascript:
var myArray = myJSPArray;
Where myJSPArray is declared some where in the JSP document.
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Jul 20, 2005
I have two events in a form that I am passing. One is to a javascript
function, the other is to the same .asp page only with another action
to show different data.
Onchange is calls the function updateclasses, which in turn reloads
another drop-down list. It also reloads the .asp page, which
refreshes the data. My problem is that it refreshes the second
drop-down briefly, until the page reloads, but then resets the form.
How do i pass this data to the .asp?
I thought in the .asp, I could just do something simple like the
following, but wasn't sure of the correct syntax. is there a better
way?
view = request.querystring("view")
if view = "" then
view = "SciLink"
else
%>
<script language="JavaScript">
updateclasses(form1, 0, Student)
</script>
<%
end if
.........
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Nov 30, 2005
im having a problem making a checkbox, button or radio input equal to that of the loop, in this case 'count'. When i print count out with the normal document.write(count); it all works correctly. but this wont help me.
Instead the result is always the last number =/
(onclick is temporary, im just using it to check the value passed)
for(count = 1; count < cookiearray.length; count++)
{
document.write("<input type='checkbox' value='Delete'
document.write(count);
document.write(" ");
document.write(cookiearray[count]);
}
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