Next Generation Plugin Problem

[tok3n]

Hi,

I have modified a simple java applet that displays the version of java the user has and if it is compatible with our system. For the system we recommend 1.6.0_18 because we have problems with some versions of 1.6.0 but technically 1.4.2 is the minimum. My applet and website is not part of the system, it is just to display info about a users browser setting so we can gather data on what version of java works the best and what settings work the best.

Problem is we recommend that the "Next Generation plugin" be turned off. The applet works fine when "Next Generation plugin" is on, but when its off the applet doesn't load correctly in IE 6,7, and 8. It works fine in firefox 3.6, 4, 5 no matter what.

Here is the error I get in the java console.

ERROR: unexpectedly couldn't get the codebase

here is my code and compile instructions.

javac -target 1.4 -source 1.4 JavaVersionDisplayApplet.java

import java.applet.*;
import java.awt.*;
public class JavaVersionDisplayApplet extends Applet
{
private Label m_labVersionVendor;
private Label m_labUpdate;
private String javaVersion;
private String javaUpdate;
private String delims="_";
private String bad_v= " ";
public JavaVersionDisplayApplet() //constructor
{
Color colFrameBackground = Color.green;
Color colFrameBackground2 = Color.red;

javaVersion = System.getProperty("java.version");
String[] tokens = javaVersion.split(delims);
javaVersion = tokens[0];
javaUpdate = tokens[1];
String[] tokens2 = javaVersion.split("\\.");

int j_update = Integer.parseInt(javaUpdate.trim());
int j_vers1 = Integer.parseInt(tokens2[0].trim());
int j_vers2 = Integer.parseInt(tokens2[1].trim());
int j_vers3 = Integer.parseInt(tokens2[2].trim());

if( j_vers1 == 1 && j_vers2 >= 4)
{
if (j_update != 10 && j_update != 11 && j_update != 12 && j_update != 13 && j_update != 14 && j_update != 19 && j_update != 20 && j_update != 21)
{
this.setBackground(colFrameBackground);
}
else
{
this.setBackground(colFrameBackground2);
bad_v = " ";
}
}
else
{
this.setBackground(colFrameBackground2);
bad_v = "Incompatible version of Java. 1.4.2 is minimum";
}
m_labVersionVendor = new Label ( "Version : " + javaVersion );
m_labUpdate = new Label ( "Update : " + javaUpdate + bad_v);
this.add(m_labVersionVendor);
this.add(m_labUpdate);
}
}


Here is the html with the applet

<applet code="JavaVersionDisplayApplet.class" height="60" width="120"></applet>

Any help would be awesome.

thanks

[dlorde]

I don't know if it matches your problem exactly, but there seems to be an IE7/JRE interation bug that gives this error when running applets - see the Java Bug Database : 6694620 - a suggested workaround is described at the end of the comments.

In theory, there is no difference between theory and practice, but not in practice...
Anon.

[tok3n]

i took a look, but didn't really find anything. The problem is happening on XP. I was wondering if the JDK im using could be causing the problem. I'm using JDK 6 update 25

[dlorde]

Possibly. I can only suggest you search online for that error message. If others have encountered the same problem, their discussions may be out there.

One can think effectively only when one is willing to endure suspense and to undergo the trouble of searching...
J. Dewey

[tok3n]

I figured out my problem. I was using MooTools 1.3.2 which has a variable call this.Document which is interfering with the java applet. Since javascript is case sensitive this.document doesn't cause a conflict. For some reason that variable in javascript effects java applets. Just found some one posting a bug report about it by pure chance. I switched to MooTools 1.2.5 which doesn't have the variable and it works.

[dlorde]

Glad you fixed it. Thanks for getting back to us

All truths are easy to understand once they are discovered; the point is to discover them...
G. Galilie