How does Java access JavaScript Values

[Ravi Kiran Va]

Hi ,

we have a requirement to capture mouse coordinates that is x and Y position and pass these values
to a Java Method

Now I have capured x and y corodinate values on a Mouse click on a web page , which is written in JavaScript.

Now how can i pass these captured values ( X and Y ) to a Java Method .

Please tell me , how can i do this ??

Thanks in advance .

[Sagar Rohankar]

Ravi Pavan wrote:capture mouse coordinates that is x and Y position and pass these values
to a Java Method

Where is this Java method, in an applet or at server side servlet method?

[Ravi Kiran Va]

Thanks sagar for responding . The Java Method is in the same Jsp .

[Sagar Rohankar]

Ravi Pavan wrote: The Java Method is in the same Jsp .

OK, that's mean method is in Scriptlet and when JSP page got request, at server side this scriptlet gets compiled, executed and its result is shown in JSP page. And Javascript is something for browser action, for client side, there is no existence of "Java Method" on client side html/jsp page.

So, you can't do this. Better try to implement the same Java Method logic in JavaScript

[Ravi Kiran Va]

Better try to implement the same Java Method logic in JavaScript

I am tying to pass this x and Y values to the MapViewer class .

This MapViewer class is from Oacle .

The logic is like this

MapViewer mv = new MapViewer("http:localhost:7001/omserver")

mv.getPoint(x, y);

Here x and y are of coordinates obtained from a Mousec click .

so please tell me is there any alternative to do this .

[David Newton]

The simplified answer is: in order to "call Java" from JavaScript you either need to submit a form or make an Ajax request.

[Sagar Rohankar]

Ravi Pavan wrote:

Better try to implement the same Java Method logic in JavaScript

MapViewer mv = new MapViewer("http:localhost:7001/omserver")

mv.getPoint(x, y);

Here x and y are of coordinates obtained from a Mousec click .
so please tell me is there any alternative to do this .

As suggested by David, try AJAX.

[Ravi Kiran Va]

Dead Lines are very tight and now can't start with AJAX .

I am thinking of this way ,please suggest will this work or not.

Inside my JavaScript function , i will send the captured x and Y coordinates to a different JSP say SecondJsp. and inside from my firstjsp i will include the second jsp using jsp:include with params and extract those values . Is this okay ??

function DataSender()
{
document.myForm.method="POST";
document.myForm.action="http:localhost:7001/AnotherJsp?xval=xcoordinate&yval=ycoordinate"
document.myForm.submit();
}

[Sagar Rohankar]

Ravi Pavan wrote:Dead Lines are very tight and now can't start with AJAX .

AJAX need half days dedication to learn and implement, as far as your specific need is concerned. Here is the basic for AJAX. [JS FAQ has good list for AJAX resources]

Ravi Pavan wrote:Inside my JavaScript function , i will send the captured x and Y coordinates to a different JSP say SecondJsp. and inside from my firstjsp i will include the second jsp using jsp:include with params and extract those values . Is this okay ??

function DataSender()
{
document.myForm.method="POST";
document.myForm.action="http:localhost:7001/AnotherJsp?xval=xcoordinate&yval=ycoordinate"
document.myForm.submit();
}

This is something, I called as explicit AJAX. If your client/manager is happy with that kind of web experience, no problem, go ahead !!

[Ravi Kiran Va]

Bear locked my Thread assuming it the same question

https://coderanch.com/t/449040/HTML-JavaScript/Upon-right-click-needed-java

Please refer to this and give me suggestions .


Need to do it .

[Bear Bibeault]

Same answer. You either need to submit a form, reload with a new page, or use Ajax.

[Saurabh Naik]

AJAX would be right optinon. at first it looks difficult.. but its easy .

learn AJAX from www.w3schools.com.

[Bear Bibeault]

Ajax can be very easy, especially with the assist of a library. In jQuery it's one line of code:

$.post('http:localhost:7001/AnotherJsp',{xval:x,yval:y});