Java VM detection

hi,
i have searched for a way to see if there is a java VM on my machine and which version.
Checking the registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment
will not work for machines with microsoft JVM.
is there a general way to detect the jvm version?

Write a small application to iterate through the System.properties.
There's plenty of information there, at least in Suns plug-in VM.
Not sure about Microsofts VM.
Eg. under Java 1.3.1_06 VM... there's the following properties..
java.runtime.version=1.3.1_06-b01
java.specification.version=1.3
java.version=1.3.1_06
java.vm.version=1.3.1_06-b01
javaplugin.nodotversion=131_06
javaplugin.version=1.3.1_06
regards,
Owen

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Java not detected even though installed?

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The solution was actually very simple - I just needed to enable Java in the Safari Security Preferences!

Java Plugin Detection using VBScript on Internet Explorer

Hi,
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Here's JavaPlugin detection for netscape and ie using JavaScript . . .
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for (pluginsArrayCounter=0; pluginsArrayCounter < pluginsArrayLength; pluginsArrayCounter++ ) {
var numFound = 0;
for(namesCounter=0; namesCounter < thePlugins.length; namesCounter++) {
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break;
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window.open("http://plugin_location");
function redirect_users(URL){
location.href = URL;
if(navigator){
browser_string = navigator.appVersion + " " + navigator.userAgent;
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Java applet detecting system states

I am currently working on a chat room applet to keep all of our emplyees connected during the day for user support and general communication; however, we have been having an issue with people not going idle lately. The solution we have settled on is trying to detect if the user's computer has been locked (a much more habitual thing to do) from the java applet that they access the system from (all of our users are accessing the applet from a windows machine). I cannot for the life of me figure out how to do this. Is this even possible in an applet or would it have to be an actual application?
thanks in advance for the help!

It's probably possible if you sign the applet code, but it's messy. You need to use JNI to access the system status which requires that an appropriate DLL is in place on the client machine. A signed applet can install one.
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Java window detection

Hello!
Has java support for OS GUI windows detection ?
Would you point me to a tutorial ?
Ps : I search over Google already
Regards,
Edited by: aurelian_cl on Sep 29, 2009 2:25 PM

I have a project that made screen pictures and save them as jpg or png files, and I want to add a new feature "Window detection." I choose java because I do not want to be platform dependent.
I not want to do a program in C/c++ for "Window detection" feature because the final project will be platform dependent.
Regards,

Java not detected in redhat 5 linux firefox

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/etc/alternatives/java -> /usr/java/jre1.6.0_24/bin/java
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libjavaplugin_oji.so is the old classic Java plugin. For Firefox 3.6.x you need the Next Generation Java plugin (libnpjp2.so)
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Kaspersky vs Java.exe detected as virus - Need help!

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c:\windows\system32\java.exe
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Hi,
I solved this problem by doing as following:
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Java -Plugin detected JRE collission

Hey ia ma using the follow script
<script language="javascript">
var _app = navigator.appName;
if(_app == 'Microsoft Internet Explorer'){
document.write( '<OBJECT ID="VoiceRecorder" class="recStyle"',
'classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"',
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first uninstall all the previous JRE version.
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Netscape browser give Java plugin detect JRE collision

hi
when i run my application on Netscape v8.0 i got a problem metioned in subject line. please help me for this.
thanx in advance

first uninstall all the previous JRE version.
Open Jav plug-in from control panel and select the java tab,
Select only one JRE version into this tab.
restart ur browser, perhaps u does not get this problem in future.

What does "java not detected" mean and what should I do about it?

I am a teacher who teaches partly online. While trying to use Screen Recorder in Kaltura Media Space to record my desktop with audio voiceover, I encountered this message in red and was not able to use this device? I am not sure what the message means or how to fix this. I am using MacOS 10.9.1 and Safari. MediaSpace is provided by our school system, so I am not able to use my iPad to do this.

Do you have a Java Preference Pane in System Preferences? if not, Java isn't installed and from your description, it sounds like it may be required. You can also try running this Java Test.
Java Test
Java

Java never detects window maximized event?

Hello All,
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Here is my basic code to redisplay the window:
myFrame.setVisible(true);
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Barb

Hello All,
My initial problem was in trying to bring a window back to the front if a user selects the menu item that originally launched that window. I had to add extra code to handle the case where the window was minimized (iconified). Once I did that, all worked as expected, except if I maximized the window, then iconified it, then selected the menu item to redisplay it, it came up, but at the size and position it was before I maximized it. However, if I restored the iconified window by double clicking on it, it came up in its maximized state.
Here is my basic code to redisplay the window:
myFrame.setVisible(true);
int state = myFrame.getExtendedState();
if ((state & JFrame.ICONIFIED) == JFrame.ICONIFIED) {
myFrame.setExtendedState(state & ~JFrame.ICONIFIED);
myFrame.toFront();After investigating some more, it seems like Java never knows that the window was maximized. That is, state & JFrame.MAXIMIZED_BOTH never equals JFrame.MAXIMIZED_BOTH. Neither bits for horizontal or vertical maximized are set either. I also tried adding a WindowState listener, and the windowStateChanged method never gets called when the window is maximized. Also, the line
myFrame.setExtendedState(JFrame.MAXIMIZED_BOTH); does nothing.
I am using Java 1.4.1_02 on SunOS 5.8.
Please help! I am baffled by this behavior!
Barb

Safari on Win7 -- Java not detected

I am trying to use Safari on a Win7 box to attend a WebEx meeting.
The WebEx Java client works on IE (so Java in installed on the machine).
However, when I try to launch the WebEx Java app from within Safari, I get an error of "WebEx Client Page tried to load Java content but Java is not available or installed"
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The solution was actually very simple - I just needed to enable Java in the Safari Security Preferences!

Java Not Working, And Still No Answers. What Gives?

Okay, decided to start this topic anew, since the only response I got to the other one was a post calling me "rude and impatient" (I guess that's what they're calling "persistence" nowadays..) , instead of...well...ignoring my admittedly pushy and harsh tone and actually being helpful. However, for the sake of it, I do apologize for my attitude in my last topic.
But I digress, let's start off on a new foot, eh? On to the problem that is STILL at hand(in other words, "patience" hasn't gotten me jack, not even a "we don't know yet"):
So last night (10 PM January 20th), the Firefox Plugin Checker said that my Java version was outdated. I also got a pop-up saying that my current version of Java at the time (Java 7 update 10) had vulnerabilities. So to try and fix this, I went to the Java page and downloaded the update (Java 7 update 11).
To check and see if my update was working, I went to Java's check page, as well as another page I use. And here I discovered a problem. I got a notification that an old version of Java had been detected, and another prompt to download the current version (which I had already done). So I erased all versions of Java from my control panel, and tried to check it again. And when I did, I got this: http://oi50.tinypic.com/35b6xx2.jpg and http://oi47.tinypic.com/15fg37p.jpg.
As you can see, both pages tell me that I need to install a missing plugin of some sort. So, thinking this would resolve the issue, I clicked the Install Missing Plugin button. This is what it told me was missing: http://oi45.tinypic.com/302uwbl.jpg. So I clicked next to install it.... and got this: http://oi45.tinypic.com/2cici0x.jpg, which I assume means that the plugin did not install. So I pressed Manual Install... and was lead/linked right back to the Java download page (where it all began, and what doesn't seem to be working in the first place)
I go to check my plugins again (Just to make sure and also for extra information), and it appears to say that my Java version is current (is that what "Java Deployment Toolkit 7.0.110.21" is? I don't know, I am not good at technology at all. Either way, here is what it looks like: http://oi48.tinypic.com/4kxzz4.jpg). So...if it is current, why is it not working (i.e. I am unable to play games, DO MY COLLEGE CLASSWORK, or play Java-based games)?
If it helps anything, here is what my control panel looks like in regards to Java right now: http://oi45.tinypic.com/2qlxu9t.jpg Am I missing anything that would make Java work?
And before anyone says that Java is not essential: It may be that way to you, but I need Java to do classwork for college. Veterinary college.
So, in short, what is going on with Java, and how can I fix it?
EDITEDITEDIT: I Have found that I can do my classwork without Java. HOWEVER, this DOES NOT mean that the problem is solved or over with. I STILL WANT TO KNOW HOW TO FIX THIS PROBLEM AND GET JAVA TO WORK. Even if I never actually need it, I would still like to have a (working!!!) Java version because of two reasons: 1) I would rather have such a program and not need it, than need such a program and not have it, and 2) aesthetics. Sorry to say, but I am very particular about how things look when it comes to my belongings, and the fact that Java is messing up is making me actually stressed. In short, I still want the above issue solved, even if it's just purely for the sake of Peace Of Mind.
Another note: I would (please!) appreciate a timely response on this matter. Even if the response is a "We don't know what the issue is and/or we are working to solve this issue.", that would satisfy me for the time being. I would just like a semi-timely response that would let me know that FF/contributors here have read the above and actually give a semblance of a care about their userbase.
Thank You.

'''ponyparty, '''
The first prompt you see in Firefox to activate Java is because Java is currently on the Mozilla blocklist ( the "Hot Topic" article [[How to use Java if it's been blocked]] explains the reason for block and how to activate Java, including how to bypass the plugin activation prompt for trusted sites).
cor-el is right about why you are seeing a second [http://oi48.tinypic.com/de8f8y.jpg Java "Security Warning"] when trying to view Java applets, that you have to click to run. This is a ''' Java''' security feature and not anything Firefox does.
Try the same Java sites in Internet Explorer .... don't you also see the Java "Security Warning?" If you want to lower your Java security back to "Medium" in the Java Control Panel, see http://docs.oracle.com/javase/7/docs/technotes/guides/jweb/jcp.html#security for details. That's up to you but I would leave it on "High " since Java 7 is still basically insecure, according to the reports I've seen and [https://blog.mozilla.org/security/2013/01/11/protecting-users-against-java-vulnerability/ this "Protecting Users Against Java Vulnerability]" Mozilla blog post.
If the second Java prompt is your only remaining issue then your problem is really solved, since it is a new Java security feature and not anything in Firefox.
Some background:<br>
At the time I was helping you in the [https://support.mozilla.org/en-US/questions/944267 older thread you started] (now locked because you started this one) the solution to uninstall JavaFX wasn't known. On Dec 13th I wrote, ''There may be problems with Java 7 Update 10 since a number of Windows users have reported that Firefox is not detecting the plugin'' and I linked to a couple of related threads, including [http://forums.mozillazine.org/viewtopic.php?f=38&t=2628935 this MozillaZine thread], in which uninstalling JavaFX as a solution was posted 22 Dec 2012. On 25 Dec 2012 in the same MozillaZine thread, I posted a link to [https://bugzilla.mozilla.org/show_bug.cgi?id=820759#c12 this Dec 24th bugzilla comment] by an Oracle employee, who posted that uninstalling JavaFX was a solution for '''Oracle's''' Java 7 detection bug. Oracle has been working on the bug (to be fixed in an upcoming Java 7 release) and they created [https://www.java.com/en/download/help/firefox_java.xml this java.com help page], which is now included in the related MozillaZine and Mozilla Support articles on Java that I posted above.

Removing the Java Deployment Toolkit?

Hello,
I was wondering if it is possible to remove the Deployment ToolKit .dll from the machine or disable it in browser within an infrastructure? I wanted to see if there are any other functionality that could be impacted I remove the deployJava1.dll from my machine or disable it in browser?
The link below shows the following information regarding blocking or removing.
What is the Java Deployment Toolkit?
What happens if the Java Deployment Toolkit plug-in is blocked?
By blocking the Java DT plug-in, the Java version detection mechanism is disabled. Therefore, when a user tries to launch a Java applet or application, that requires a specific Java version other than the active Java version on a user’s system, it will fail.
Does this mean the application will break? Or just that the detection mechanism will be broken for the application version check and the app will still run? I would like to remove these bits to ensure no version checking is done on my systems.
Thanks,
Michael

Your "More System Details" doesn't show any Java plugin at all. Are you sure you have the current version installed? This test page will lead you to a download if needed:
http://www.java.com/en/download/testjava.jsp
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Java will not run in IE9

I find this problem posted all over the internet -- however, I have found few answers and no solutions that work.
Java will not run in IE9
In the last three days I have installed Java 7.5 at least five times (after total uninstalls).
I have Windows 7 Home premium with all updates installed. Anti-virus programs are installed.
Even the java website http://www.java.com/en/download/testjava.jsp cannot detect the Java program in IE9. It displays the following message: “No working Java was detected
on your system. Install Java by clicking the button below.”
I know you don’t want to hear about other browsers, however, this is part of the diagnoses – Java works fine in Chrome. (Obviously, there are some programs that can only be accessed in IE.)
I have tried turning off the firewall, anti-virus AVG, active x filtering, and every other program. I have cleared the browsing history, cookies, etc. 50 times = nothing works.
I experienced that Java did work once and only once in IE9 after each of two new reinstallations of Java 7.5.
Process Explorer shows that Java is running, I’ve included a screen- shot (hope it shows up)
All knowledgeable answers are appreciated.

Hi,
Have you tried the compatibility mode in Internet Explorer 9? Or does this issue occur to previous Internet Explorer versions?
For reference about compatibility mode:
http://blogs.msdn.com/b/ie/archive/2010/10/19/testing-sites-with-browser-mode-vs-doc-mode.aspx
How to use Compatibility View in Internet Explorer 9
You could try to deselect the “Automatically Detect Settings” to check how it works.
And enable the scripting of Java applets settings:
1. Click "Tools" --> "Internet Options"
2. Next, select the Security Tab, and select the "Custom Level" button
3. Scroll down to "Scripting of Java applets"
4. Make sure the "Enable" radio button is checked.
5. Click OK to save your preference.
Or you could try to change the settings in group editor:
Computer Configuration\Administrative Templates\Windows Components\Internet Explorer\Internet Control Panel\Security Page\Internet Zone\Java Permissions
Meanwhile, I suggest you could
reset Internet Explorer settings to see the results.
Hope this helps.
Vincent Wang
TechNet Community Support

Java VM detection

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