Corrupt Java Install

[Dave-H]

Well I've fixed mine too!

All I had to do in fact was to disable and re-enable the "Enable Java content for browser and Web Start applications" option in the Java Control Panel Security tab, and it all came good. The IE option in the Java Control Panel Advanced tab is now checked and staying checked.
The Mozilla one still isn't staying checked, but it was always like that before, and it works in Firefox anyway even without it checked.
What the problem actually was I have no idea, but I guess something just needed resetting.
It's working fine in IE8 now!
Thanks everyone.
Cheers, Dave.

[dencorso]

Me too. Your tip did the trick! Thanks!

However, the presence of the older java requires a direct link to the Java Test Page. This link does work:

https://www.java.com/en/download/installed8.jsp?detect=jre

[Yellow Horror]

11 hours ago, Dave-H said:

All I had to do in fact was to disable and re-enable the "Enable Java content for browser and Web Start applications" option in the Java Control Panel Security tab, and it all came good.

It works for me too. I get a jp2launcher.exe error at re-enabling the option, but then Java works ok in both IE and FF. Thank you!

[Dave-H]

Good to hear!

[luweitest]

To get rid of JRE 1.8.0_152 install file,  I compared the registry, made a reg file as attachment, and got 1.8.0_202 running without install 152 first. I tested https://www.java.com/en/download/installed8.jsp with IE8,  it works.

But... Is there any web page that still needs java to function? And now only IE8 on XP can run java. I recall using a college VPN with java, yet it was long ago. Now I only need java for Davmail.

JRE 1.8.reg

[sdfox7]

3 hours ago, luweitest said:

To get rid of JRE 1.8.0_152 install file,  I compared the registry, made a reg file as attachment, and got 1.8.0_202 running without install 152 first. I tested https://www.java.com/en/download/installed8.jsp with IE8,  it works.

But... Is there any web page that still needs java to function? And now only IE8 on XP can run java. I recall using a college VPN with java, yet it was long ago. Now I only need java for Davmail.

JRE 1.8.reg

I think it's probably impossible to quantify the number. However, many companies, including my own, rely on Java applet plug-in for intranet sites that have been around for "The Ages."

[Mathwiz]

17 hours ago, luweitest said:

To get rid of JRE 1.8.0_152 install file,  I compared the registry, made a reg file as attachment, and got 1.8.0_202 running without install 152 first. I tested https://www.java.com/en/download/installed8.jsp with IE8,  it works.

JRE 1.8.reg

It works for IE8, but if you want it to work with Mozilla-family browsers (FF 52 ESR, NM, Basilisk, SeaMonkey), you need more entries to register Java as an NPAPI plug-in:

DTPlugin.reg

JavaPlugin.reg

[luweitest]

6 hours ago, Mathwiz said:

It works for IE8, but if you want it to work with Mozilla-family browsers (FF 52 ESR, NM, Basilisk, SeaMonkey), you need more entries to register Java as an NPAPI plug-in:

DTPlugin.reg

JavaPlugin.reg

FF 52 has removed java support. Although ESR version is said to work, yet after importing the two reg file,  https://www.java.com/en/download/installed8.jsp?detect=jre still do not work here (applet loaded, but "cannot verify certificate" error), nor any test pages work (security white list have been added):

https://www.csie.ntu.edu.tw/~lyuu/Capitals/javatst.htm (ClassNotFoundException)

http://www.stat.cmu.edu/~hseltman/javatest/  (NullPointerException)

...etc. But IE8 works for all of them. Does Firefox need some other configuration?

 

 

[Mathwiz]

Both of your test sites use certificates signed by untrusted roots, so you have to add them as exceptions in the Java control panel applet. If you do that the CMU applet still has problems, but the other works fine on Roytam1's latest Serpent build:

Oracle's "Verify Java Version" page also works.

Did I leave something out of those .reg files? You should see something like this in Tools / Add-Ons / Plugins:

HTH

[luweitest]

Yes, the problem occurs when exceptions have already been added.

I am using Firefox 52.9.1ESR, and Tools / Add-Ons / Plugins:

[luweitest]

Yet another bug: jnlp file cannot open, whether they are from IE or Firefox, or open locally.

I test jnlp samples from:

https://docs.oracle.com/javase/tutorialJWS/samples/uiswing/WallpaperProject/Wallpaper.jnlp

The error message:

AppName: jp2launcher.exe     AppVer: 11.202.2.8     ModName: msvcr100.dll
ModVer: 10.0.40219.325     Offset: 0008d6fd

I downloaded the corresponding WallpaperProject.jar file, which can open normally.

Command line javaws -verbose WallpaperProject.jnlp gives:

Edited February 27, 2019 by luweitest

[Mathwiz]

7 hours ago, luweitest said:

Yes, the problem occurs when exceptions have already been added.

I am using Firefox 52.9.1ESR, and Tools / Add-Ons / Plugins:

Hmm ... I haven't tried it with FF 52.9.1 yet. I'll download it and give it a try. Perhaps Mozilla broke something....

[Mathwiz]

7 hours ago, luweitest said:

Yet another bug: jnlp file cannot open, whether they are from IE or Firefox, or open locally.

I test jnlp samples from:

https://docs.oracle.com/javase/tutorialJWS/samples/uiswing/WallpaperProject/Wallpaper.jnlp

The error message:

AppName: jp2launcher.exe     AppVer: 11.202.2.8     ModName: msvcr100.dll
ModVer: 10.0.40219.325     Offset: 0008d6fd

New versions of jp2launcher don't seem to be compatible with Windows XP. I've been copying jp2launcher.exe from 8u152 and using that. I'm not sure what, if any, functionality I'm losing, but it seems to work.

[Mathwiz]

3 hours ago, Mathwiz said:

Hmm ... I haven't tried it with FF 52.9.1 yet. I'll download it and give it a try. Perhaps Mozilla broke something....

Well, I'm stumped. I just downloaded and installed FF 52.9.1 and Java works for me, the same as in Basilisk. The only thing I did to the new 8u202 install was to copy jp2launcher.exe from the old 8u152 install. Everything else is exactly as installed.

Edit: I'm uploading one more .reg file. It's only needed if the Java applet isn't in your control panel. That happened to me after I uninstalled an earlier Java version.

javacpl.reg

Edited February 27, 2019 by Mathwiz

[luweitest]

 

14 hours ago, Mathwiz said:

Well, I'm stumped. I just downloaded and installed FF 52.9.1 and Java works for me, the same as in Basilisk. The only thing I did to the new 8u202 install was to copy jp2launcher.exe from the old 8u152 install. Everything else is exactly as installed.

Firefox problem solved. I did not recall my IE and Firefox have different proxy setting. IE uses a http proxy while Firefox uses socks. Both proxy are opened by Freeproxy 4.1 on the same win7 machine. Changed Firefox to use http proxy also, and all test pages work. So I build a new socks proxy using Delegate, which works fine. So unexpectedly the culprit is Freeproxy.  I have used Freeproxy for a long time without any problem, until now. Delegate is the way to go!

15 hours ago, Mathwiz said:

New versions of jp2launcher don't seem to be compatible with Windows XP. I've been copying jp2launcher.exe from 8u152 and using that. I'm not sure what, if any, functionality I'm losing, but it seems to work.

When using java plugin, jp2launcher is also called, and it runs OK. Error occurs only when opening jnlp file. The difference is jnlp is opened by javaws.exe first, then javaws.exe calls jp2launcher. So maybe javaws.exe is the culprit, but neither file copied from 8u152 works for me. Even if I install 8u152, jnlp error persists.