Java on Remko's Blog

Java has discovered application components that could indicate a security concern

Tue, 19 Mar 2013 13:13:04 +0000

When starting a particular web based application Java popped up the following dialog:

The dialog asks us if we want to Block potentially unsafe components so to continue we should click no. However users tend to not really read such messages and click Yes which leads to this error:

Oracle Client install fails with NullPointerException

Tue, 06 Sep 2011 15:51:45 +0000

Today I was asked to assist in troubleshooting an Oracle Client (10g) installation. The installation halted very quickly with a java.lang.NullPointerException:

Switch between Java Versions

Wed, 12 Nov 2008 16:37:52 +0000

On a Citrix environment 2 different applications were required. One of the applications required java version 1.5 (and didn’t work with 1.6) and the other application needed specifically version 1.6.

Because the applications are installed on a Citrix server the users do not have write permissions to HKEY_LOCAL_MACHINE so that was another complication.

After a lot of monitoring with process monitor the general process of how a particular Java version loads in Internet Explorer became clear to me.

Java adds an addon to IE called ssv.dll, you can see this trough Tools | Manage Add-ons | Enable or Disable Add-ons: