Solved

Passing a value toJavaScript

Posted on 1998-08-10
4
160 Views
Last Modified: 2010-04-16
I want to create a slider in java which can be used to pass a value to a javascript function located on the same page at the Applet.

Is this possible, and if so how.
0
Comment
Question by:RICHARDH
  • 3
4 Comments
 
LVL 28

Accepted Solution

by:
sybe earned 50 total points
ID: 1232256
I have just answered a similar question, so I'll repeat my answer here.


    sample code for the applet:
    ===========================
    import java.applet.*;
    import netscape.javascript.JSObject;

    public class JSObjectTest extends Applet {
       JSObject mozilla;
       String[] args;
       String msg;

       public void init() {
          msg = getParameter("msg");
          try {
             mozilla = JSObject.getWindow(this);
          }
          catch (NoClassDefFoundError e) {}

          String args[] = {msg + ""};
          try {
             mozilla.call("setVar", args);      
          }
          catch (NoClassDefFoundError e) {}
       }

    }

    =========================================

    sample code for HTML/Javascript:

    =========================================
    <HTML>
    <HEAD>
    <title>JSObjectTest.java</title>

    <script language="JavaScript">
    <!--
    function setVar(msg){
    alert(msg);
    }
    // -->
    </script>


    </HEAD>
    <BODY BGCOLOR="#FFFFFF">

    <applet name="jsobjecttest" code="JSObjectTest.class" width=2 height=2 MAYSCRIPT>
    <param name="msg" value="Your browser supports Java to JavaScript using the JSObject class">
    </applet>

    </BODY>
    </HTML>
    ======================================

    Note that the applet passes the parameter "msg" (in the applet tag) to the javascript function SetVar.

    That function is in this case an alert. But it could be anything like document.bgcolor, document.location etc.
0
 

Author Comment

by:RICHARDH
ID: 1232257
For the attention of sybe...
Many, many thanks for a very precise answer. I have one further question.

Where do I get the Netscape.javascript class which is imported into the Applet.

Thanks again
0
 
LVL 28

Expert Comment

by:sybe
ID: 1232258
If you have netscape (3+) installed, you should add the path to the netscape java classes into the CLASSLIB environment variable.

You can easily view the netscape classes by making a copy of it and renaming that copy to *.zip. Then you can open it using winzip.

If you have MSIE4 installed you will find it under one of the directories of C:\windows\java.

If you have found the right zip containing JSObject.class then add it to the CLASSLIB environmental variable:


something like:

CLASSLIB = C:\JDK\LIB\CLASSES.ZIP;C:\NETSCAPE\NAVIGATOR\PROGRAM\JAVA\CLASSES\java_30


0
 
LVL 28

Expert Comment

by:sybe
ID: 1232259
sorry, CLASSLIB should be CLASSPATH
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

For beginner Java programmers or at least those new to the Eclipse IDE, the following tutorial will show some (four) ways in which you can import your Java projects to your Eclipse workbench. Introduction While learning Java can be done with…
Java functions are among the best things for programmers to work with as Java sites can be very easy to read and prepare. Java especially simplifies many processes in the coding industry as it helps integrate many forms of technology and different d…
Viewers learn about the third conditional statement “else if” and use it in an example program. Then additional information about conditional statements is provided, covering the topic thoroughly. Viewers learn about the third conditional statement …
The viewer will learn how to implement Singleton Design Pattern in Java.

773 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question