New Apple Java update breaks jnlp file association

I thought this might be helpful for other people experiencing this problem.
It seems that the latest Java update for Macs (10.5 update 4) breaks the file association for jnlp files. When you use one it opens up a text editor. To make matters worse they have moved the location of Web Start.
The only way we have been able to fix this is:
1. Control-click the jnlp file that was downloaded to the desktop and select Get Info
2. Click Open with and select Other.
3. At the top of the window select All Applications in the Enable box.
4. Browse to /System/Library/CoreServices and select Java Web Start.
5. Click the Always Open With checkbox at the bottom.
6. Click the Add button.
7. Double-click the jnlp file on the desktop which should now launch the workbook.
If anyone else has some more information or another solution, then please reply here.

Thank you so much for this. I didn't find this post the first time I searched on this problem, and I was mired down in versions-specific directories with javaws--which appears only as a link that cannot be used as an association.
MUCH appreciated!
--Paul

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I installed SUN JRE 1.5 Update 7 in a fresh Windows XP machine and found the registry recongizes the JNLP file extension is associatied with it. Then I installed an application that downloads IBM WebSphere Application Client 6 which actually uses IBM JRE 1.4.2 . After this installation IBM JRE changes the .jnlp file association from Sun JRE 1.5.0_07 to its own 1.4.2 version.
Now I needed to change the JNLP file association back to previous one. I used Windows Explorer->Tool->Folder Options->File Types->Advanced->Edit and did that. However, I see my registry didn't change the association from IBM JRE to Sun JRE. But when I look at Java Control Panel, it says its associated with Sun JRE. Here is a windows shell script that I run to see the current JNLP file assocaition - which alwasy tells me its OBM JRE which is associated with the JNLP file extension. I tried restarting the machine, removing the cached copy from Java Control Panel without any difference.
Can you tell me when this file type association may not work and why? Is there any Windows Security Patch issue here? Also what are the registry keys that I should look for (a few are mentioned in the script below)?
code:
// To run it:
// CScript //Nologo JWS.js
var fso = new ActiveXObject("Scripting.FileSystemObject")
var gShell = new ActiveXObject("WScript.Shell")
function print(s) {
WScript.Echo(s)
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print("Sun JWS")
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function IBM_JWS() {
var ver = "1.4.2"
var regKey = "HKLM\\SOFTWARE\\IBM\\Java Web Start v" + ver + "\\"
var path = gShell.RegRead(regKey + "\\" + ver + "\\Home")
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print("IBM JWS for HKLM: ")
print("\tversion: " + ver)
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function JNLP_ASSOC_HKEY_LOCAL() {
var regKey = "HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\JNLPFile\\Shell\\Open\\Command\\"
var path = gShell.RegRead(regKey)
var javaws = path + "\\javaws.exe"
print("HKEY LOCAL MACHINE Current JNLP File Association: ")
print("\texe: " + javaws)
function JNLP_assoc_HKCR() {
var regKey = "HKCR\\JNLPFile\\Shell\\Open\\Command\\"
var path = gShell.RegRead(regKey)
print("Current JNLPFIle association for HKCR:\t" + path)
function main(args) {
JNLP_ASSOC_HKEY_LOCAL()
JNLP_assoc_HKCR()
JavaSoft_JWS()
IBM_JWS()
---------------------------------------

Did the clients happen to know what version they were upgrading from? We have seen this mostly when a system upgrades major Java versions, eg from 1.6 or 1.7 or switching from 32 to 64 bit Java and C:\Windows\System32\javaws.exe disappears or something silly.

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HT5744 Is it safe to download the latest apple java update

Is it safe to download the lates Apple java update?

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Java update breaks apps

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We have a JNLP application. A recent Java7 upgrade seems to have removed the file association between javaws.exe and .jnlp files. We have experienced this on multiple client machines. On one, Windows would not all us to create the association through the normal means of "Open With...".
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rcasha wrote:
I have a webstart application, and I'd like to add a function to check for updates while the program itself is running. DownloadService2.getUpdateAvailableResources checks for updates in the JAR file, but not the JNLP file that launched the application. If I deploy new versions of the JAR files I get prompted, but if I add a new JAR file to the JNLP file I don't.
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I guess my old login is not working anymore. That's funny but it is not the case.
Well I have installed all Java updates and I cannot get it working right :]
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New Apple Java update breaks jnlp file association

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